I'd have to see what they did with Shadowheart. She was my favorite some patches ago, because she felt like the most complete and because her relationship with a practical MC is actually pretty neat, yet after playing a bit yesterday i gotta say i was pretty underwhelmed by what they did with the option to save her during the intro. Feels quite shallow compared to the alternative.
But anyway, if she stops being my favorite then it's Lae'zel. She's the most normal out of everyone, and the only one with some kind of bro energy.