I read a bit about Collier when I was in Chicago. He was playing at the Jazz Showcase in support of a new album, but I didn't get a chance to see/hear him. I did listen to some of the new record (on Bandcamp). Pretty good. ...As you suggest, mjazzg, I hear lots of not-quite-fully-digested late Coltrane and Pharoah in his sound. But he's young. ...Like lots of other young players, he definitely vibing on the early-70s "spiritual jazz" thing that's come back around.
Somebody to keep an eye on.