It's more like Larians failed take on who she was in BG 2. Presumably she used arch-druid magic to preserve exactly how she "was" as Larian understand it.
Again, Larian didn't do that bad. They didn't make her coombait, when they probably could have. They kept her at least similar to her BG2 pic, which as I said isn't drawn in a way that lends itself to look good in 3D.
Maybe you just don't get how bad it could have been.
This is Jaheria according to Wizards of the Coast's last BG product:
View attachment 31371
This is her from their Idle Champions game:
View attachment 31372
I agree that the hair is too similar, but other than that, you have nothing to complain about. What specifically is wrong with her to you?
Other than her being old now, and a slutbag who couldn't wait to jump CHARNAME's bone after Khalid bit the dust, I mean.