I think you are right, he will be a nice player for DePaul. In their game against Williams team it was very clear the Butz and Williams were good players, but Brooks even as a sophomore, was on a whole different level.
Butz is a good player, but wasn't highly ranked. I think DePaul was his only big offer. I watched him play against Malik Williams (Louisville commit and top 30) and Butz outplayed him. Part of that may have been the fact that Butz was on a much better team .
I agree on Brooks. I live in the same city as Brooks, and have watched him play several times. I hate to even say it, but reminds me a lot of KD in high school. Right now I would say he is a MSU lean. Izzo has been in town twice this year to watch him.