I mean I feel like not doing ANY paid DLC for the Game is such a weird thing. If it adds new story, maybe 1-2 new companions which you can have from the start of the DLC (ofc flesh out some other companions first, such as Karlachs companion quest or Minthara, shes also very barebones tbh) and people are willing to pay like 20+ bucks for that depending on the size of it.
Sure releasing a Definitive Edition (or Absolute Edition to make it "line up" with the Game lolol) is also and hopefully happening, with fixing Act 3 and making it feel less cramped or confusing, but why not both? Sure they got a HUGE financial push for their next game with the amount of sales, but releasing something for BG3 means they also get some neat profit again to make it safely through development.
But I'm also very afraid that we won't get an actual fix for Karlach even if they release a dlc / Definitive Edition, because iirc they said they wanted to give us something promising and hopeful with the epilogue to finish it off. Which they did tbh, that means they could just leave it open ended with Karlach and just not go any further with her, since her writer seems to be an absolute edgelord for whatever reason, he probably thinks that either letting her die, or sending her back to the place where she was enslaved for years and where she now has to fight basically non-stop to not be caught again, is peak writing and deserving for an award.