Well the biggest take away for me, they redid Wyl's story from the beginning.
I didn't really dislike the premise of Wyll's backstory, so I'll have to wait and see if the new version feels like an improvement before celebrating. Alzo, Mizora better still be a thing.
You see Wyll summoning Mizora to him in the video when they are talking about Warlock patrons and classes having RP value, not just mechanics. Its a wicked looking scene.