His game reminds me of of Andrew Nicholson. He needs to work on his awareness big time, but I've just been watching a couple of his high school games, and you can clearly see major potential. Had some good moves down low, but played on the perimeter a lot. Also had a couple of nice pullups. Bricked a lot of threes though. Probably should stay away from that.
On defense, he has the feet and athletic ability to stay with anyone on the court on switches, can block some shots, but isn't really a tenacious rebounder or a very physical presence inside. Saw Derrick Walker games, when watching Trimble and that's the kind of guy that would've killed here. Still, Keita can be a really good player.
Main thing he needs to do on offense is either hit his threes, or stop taking them and play within the offense. Defensively, he's solid, just needs to get after rebounds.