I am very curious about what they changed with Wyll. A lot of people found him boring so I suppose they maybe considered that in rewriting him. They also specifically said that he had a great story to tell but they weren't telling it well, so I'm guessing that his backstory in general is the same but they've done a lot of re-writing of his dialogue within the game. Him having a connection with Karlach now is really interesting. I wonder if it's got anything to do with Mizora wanting to get in good with Zariel and cash in on some sort of bounty? As long as they haven't re-written him to make him more overtly evil, I'm eager to see what they've done.
I'm also excited about what I heard regarding Warlocks. That sounds really cool, in conjunction with there being so much more dialogue in the game has me feeling confident that the initial EA classes are going to be brought in line with the later classes in terms of dialogue options, which I always assumed anyhow. But I wonder how they're going to go about the patrons? I hope they aren't too restrictive, but I'm pretty open personally. When I saw the pixie in act two my first thought was "oh, will my archfey warlock have reactivity related to that?"
Speaking of act two, interesting that the shadow-cursed land is going to be act two in its own right, maybe with some extra stuff around it. And the city itself will be act three. Very fascinating. I love the idea of Baldur's Mouth. Reading about our exploits is going to be incredibly fun.