Based now upon what I'm reading about why Dre left (from his father) I say the Buffs WILL be better without him. Period!
You don't need your so-called "best player" hanging around, with a someone always whispering in his ear, "Screw the wins and your teammates, work on YOUR OWN game for the next level!" Gee, that kind of attitude is exactly what, in large part, caused a talented UK team to crater this year. Dissension in the locker room is not a good thing, its now appearing better for the team that Dre moved on, based upon what his old man said. Talk about "poisoning the well"!
Consider too, that perhaps one of the big reasons the half-court "O" was so poor this year, was precisely because a big part of it was supposed to run through Dre and he simply was not up to the task? The holes in the stat lines from his leaving will likely be easily filled by a combo of both returning and new players. Take away that potential attitude issue and the team should be better.