Wyll needs more content that is about him. Now we just go from Karlach to Mizora to his father.
Astarion's writer put a lot of love into him and had years to do it, and it shows.
Yeah, Astarion seems to be the gold standard for amount of companion content in BG3.
In terms of more content about Wyll, I would really like more exploration of what it means to be a hero and how much self-sacrifice is involved in the path he's chosen. How much of a difference is there between Wyll Ravengard and the Blade of Frontiers? Does he want them to be separate, or does he fully want to be his heroic persona, with no gaps in between? To be a person he can be proud of, must he reject everything about himself that mightn't fit the image of a hero?