There are new threads every day on all forums that the Act3 is a complete mess and is incomplete. I found one new here few minutes ago (https://forums.larian.com/ubbthreads.php?ubb=showflat&Number=898253&gonew=1#UNREAD). So If Larian wants their reputation back, I'm 100% sure, they will release DE version of the game and hopefully with Karlach additional endings. Her story is not completed and avernus ending doesn't make sence even after patch 2 (new dialogs are nice, but have nothing to do with the fact, that we cannot in actual game fix her engine).