How redeeming Gortash would improve Karlach's story
I will admit, that the title is a bit overstated, because by the time you actually get to interact with Gortash, the plot just does not have enough time left to redeem him. Because other than what some folks in Hollywood think: No, giving a character one last minute "heel-face-turn" with one big symbolic act does not in fact redeem a character. Redemption is a process that takes time.
BG3 actually understands this, because Astarion's arc basically ends with: "You took the first steps towards redemption." Which is really good.
However: You could end the game at least in a way to set Gortash up for a possible redemption arc - and more importantly just... not have him die. Because actually that would improve Karlach's character arc.
I will get one thing out of the way first: The entire "Gortash redemption" idea is always contentious on the fact that he is a really bad guy. Like, he is bad. He brutally killed and tortured, he enslaved people, all of that.
I am an anarchist though. Hence, I do not really believe that punishment is in any way just. And to put it differently: Killing Gortash does not undo any of the harm he has caused. Not a single dead person will live through it, not a single tortured person will become untortured through it, and no slave is freed through it either (you kinda gotta say that as the player in a different mission).
And yes, I will say at this point that in general I was iffed by the fact that in many fights of the game I was not given a choice really. It was "either join the bad guys or kill them", and my "all charisma bard", who does not believe in killing for revenge, was like: "But... But..."
Like, my Tav was on board with killing Cazador (because literally in the situation it is "kill Cazador or have 7000 people die") and killing Ketheric (because he needed to die to end the curse), but he is already iffy on Orin (as she never had a choice but to be a killer) and definitely is not on board with killing Gortash (because there is no good reason to do it).
But let me talk about Karlach. Because the thing is... I have seen a lot of commentary on how Wyll is underwritten. And he is. But not as underwritten as Karlach. Like, her entire companion quest basically goes: "Kill some fake paladins, find Dammon, find two pieces of Infernal Iron, kill Gortash (which you have to do for plot reasons either way)". She doesn't really have a dungeon connected to her quest. Nor really an exclusive boss fight, because again: Gortash you kinda gotta fight for the story either way. Nothing really.
Every other character, too, also has to make one hard decision. Where they want one thing - but what is actually the good thing is something else. I wrote about this before, the "become what you hate" decision, basically.
Karlach doesn't. Sure, you could argue that the "die or go back to Avernus" decision is her big decision. But it feels very different than the decisions of the others.
Which brings me to Gortash and saving him.
Here is the thing: Logically speaking Gortash should probably be able to fix Karlach's engine. He understands infernal engines, as he built the Steel Watch around them. You can easily argue that yeah, he should be able to fix Karlach. And that... would actually make for a great decision for Karlach's story.
If I would get to fix Karlach's companion quest, I would probably do it like this: Put in some sort of dungeon where Dammon sends you in the hope that you can find some plans there, that might give him an understanding on how to fix the engine. Heck, if you do not wanna do a whole new dungeon, you could also just put some plans or whatever into the Steel Foundry.
The point is that it will then turn out that, yeah, even with those plans for some reason Gortash is the only one who could fix it. Putting Karlach into the spot to make this decision: Does she value her life more than her revenge on Gortash?
Because here is the thing: Gortash is supposed to be 1) the intelligent one of the dead three chosen, and 2) also clearly is the one who acts first and foremost in some sense for his own self-preservation. Which made me go like: "Nah, this does not make sense," when he decides to fight against me after his Steel Watch was disabled and I already killed the other two chosen.
So, yeah... You should get at least a chance to persuade him to just give up - or, going back to what I was talking about before - to save Karlach.
And again, I actually think that even for the Gortash part of the story it would make for more interesting storytelling. Killing him is not really that interesting.
Especially as, once again, killing him does not undo any of the harm he has caused. But given that he is this big egghead he could actually do something good if he got to live. And yeah, also there is the fact that... You know... Given what we know about his backstory, his actions are about as understandable as those of some of the companions.
Some of you might already know, I have written some fics dealing with the way how I would imagine something like this to go. Mainly Hurt begets Hurt (which is basically my Tav convincing Gortash to give up), An Impossible Future (Karlach inner turmoil after her engine is fixed) and Cheesy Noodles (Gortash being a big meany towards Tav, who is unphased by this).
I am right now writing a story featuring Astarion dealing with a very, very depressed Gortash.
marrying my two loves: drawing nothing but my dark urge (esper) for a month in a fit of hyperfixation and bullying his grace lord archduke enver gortash chosen of bane for his taste in clothes
I like Gortash not because I want to fuck him but he has the most unhinged and selfish answer for “I’m so full of hatred and grief. Where should it go?” And this bitch said “anyone and everyone who has ever wronged me plus those who could grow to wrong me. I am a comet and your life is forfeit, die under my heel”
Slightly chewing on the 'well you always had control of your Urges' from Gortash.
Thinking about how maybe Gortash got that idea because Durge really made an effort to clamp down on them once the Feelings started.
Gortash never really saw them at their worst. Wracked with pain, doubled over trying to fight that burning need - refusing to fall into that easy blood haze where all would be well after. Sometimes, just giving in to get it over with.
He never saw it. They made sure he didn't see it. They didn't want him to see them like that.
But every once in a while the Urge got its way and Gortash saw them dismantle a person or two in a fit of blind rage and it was over after.
He had an idea of what it could be, but never the depth of it.
Composure was important in an alliance, after all.
"You were always so good at controlling your Urges..."
Not gonna lie, I think my favorite potential options to follow 'Is that what you-', are 'think' and 'want'
Is that what you think? You get to come back and tear everything apart because it has to be this way? As in, You think you can just waltz back into baldur's gate- no- my life, play the same little games we used to play, rekindle our alliance, just so you can throw it right away? You think you can do that while telling me you RETURNED the feelings?
You think 'this is how it must be'? Do you REALLY think that?
Or in a similar way:
Is that what you WANT? To throw it away this second chance we have? To destroy everything we worked so hard to build together? Now that we are finally together once again?
Incredulous and angry, like he is about to argue with them, try one last time to get Durge to see reason after the hesitation brought on my his memories, his emotions, gets the better of him. But then he reels himself back in and proceeds with the battle instead. Because that's not his Durge and it's what he HAS to do. It's just. Hhhhhhhhh
Like, you KNOW the only reason they gave us durgetash crumbs in the form of narrator lines is because getting more Gortash lines is too hard. You KNOW they would have if it weren't fucking Jason Isaacs.