While I appreciate your optimism, the fact that they call the ending "What she (Karlach) deserves" does sound very final.
Well, given the dissatisfaction, I imagine it wont be. This is just a restoration of cut content, which is fine. But there's work to be done which can't happen as quickly as just putting something that already exists back into the game. Give it time, a Definitive Edition or something major will come when Larian has had the chance to take a break, invite actors back, and so on.
How much time? We can only hold out hope for so long. The only possibility of anything I've seen that they might do something more has been fan-speculation, without a single official word from Larian themselves. It's hard to get my hopes up in that circumstance.
It's a great game, a fantastic game, and I want more games like this to be made; queer-friendly, well-made games that AREN'T microtransaction simulators. I feel it deserves all the success and praise it gets. But I can't continue playing it. It's not worth investing my time and effort into if this is how they intend to leave things. And I can't forgive them for that.