DnD fans will be disappointed anyway no matter what happens because nothing is ever good enough for super fans. You just gotta learn to shove those people aside and throw them away like the trash that they are. I'm glad Larian is strong willed enough to do this.
DnD fans are not trash.
I think that if a game works together with wotc and uses the DnD licence, it should use the DnD rules and not a strange mix of DnD and their own crazy stuff.