Kellogg looks like a really good player. The shot is ridiculous and he has good size, which is really welcome.
When players have one really defined skill, I think it's easy for them to over-rely on that and not work on other skills, especially in high school. My memory of players like DeJoe and Walters, or Pat Frasier from Hopkins were of guys hanging out above GLE just waiting to receive the ball so they could rip a shot with their feet set. When they were allowed to do that it usually worked out pretty well, but if you are one trick pony, it's that much easier to shut you down. The good news about Kellogg is that it sounds like he's spent time working on his passing, and there were a number of clips of him shooting on the run.
Important to remember these kids are just rising juniors in high school and can develop (or not) a ton more over the next two years. Very curious to see how he develops over the next couple of seasons.