I watched a lot of Grove in HS, almost every game his junior and senior year. When he committed I didn’t think he was a P4 player but he has proven to me that he can at worst be an energy backup big in the B10 what is a huge credit to him.
But to answer your question about his shot, he was a very quality 3 pt and FT shooter in HS. I’m shocked how bad he is from the line, it has to be all mental because he didn’t seem like a liability from there. But he would let the 3 ball fly in HS and was solid shooter for a HS big. Also Alexandria had another D1 big in Chase Thompson (would love to add him in the portal, with him being on the fringe of Clemson rotation as a freshman) and Alexandria just runs and guns from 3. Grove was struggling with he came back from injury his senior year.
Long story short, he at least has the framework to be a ok shooter, he also has 3 more years to develop. Overall I’m happy where grove is at in his development process