it's EA so let's relax a bit on the apocalyptic language but i will agree that something is definitely up with their narrative vision for her in particular. I've said it before, but i'm getting the feeling she's supposed to be more important than just a normal companion. Unless this is all just a reaction to the "companions are assholes" criticisms and the whole "we released the evil companions first" was total nonsense and she was meant to be a "good" companion. Right now we're in a weird in-between where she switches almost instantly from friendly to snarky teenager to friendly and it's very jarring. Now that i see they're willing to change companions, I'm not too worried.
It's the other way around man. I would hope they would either stick to their guns and say "this is the narrative we are building, you have a very limited understanding of what's going on and you'll have to be patient" or do try to change her in a way that won't change who she is as a character, specifically just write her a better dialogue. But they chose to go the easiest ( in the short term) route and did what Larian does best - eating the pie and leaving it whole - change some of her dialogue while trying to keep as much as the old dialogue as possible. To me it says they are either don't feel confident about the story and characters they built, they don't really understand the characters and story they built, or they don't really care.
Another option they could have taken is to change her character in a big and meaningful way - while I might have looked at it with a bit of contempt, it would have been much better than what they did.
By the way, I didn't finish my patch 5 playthrough but I already saw another place where they just made things worse, it isn't as bad as shadowheart, but it is pretty lame - your first talk with Kagha and the tieffling girl situation