I don't think so. Karlach once again got the most attention in this Patch, she has well over 50 mentions, more than any other character.
While I'm mostly hopeful that she'll get something better than the simple epilogue we got, that patch had a few polish updates to said epilogue. If they agreed with their players and decided to change the ending, why waste time polishing it? Unless they want to leave it in as a bad ending, I guess?
The reason they "polished" the Avernus ending was because it was quite literally unfinished before that. It just cut to black, if I remember correctly. This means they didn't have time to finish it up before release. I'm beginning to think a lot of the "new" features we've been getting in these patches are features they couldn't finish up in time. The ability to change your appearance is quite a basic feature that ideally should've launched with the base game. If I'm correct, and if the rumors of a once-existing Upper City are correct as well, then we can reasonably expect to see it in a definitive edition. And with it, mayhaps a good resolution to Karlach's predicament.
