Maybe I'm in the minority, but I'm not that upset with 247's treatment of Coleman.
For starters, high school quarterbacks are a crapshoot in general. There's a lot of room for subjectivity.
But beyond that, Coleman actually does have outlier size. He had some trouble getting his throws off when I saw him live in the state title game. He also doesn't play any other sports in high school. Per reports, he didn't do well hitting deeper targets at Elite 11. He has an edge, which can be good, but the UA camp is the first time I've heard a counselor call out a QB during the award ceremony for having an attitude.
That's not to say he will fail. I'm excited to watch him, and the coaches are over the moon about him. But this isn't an injustice of a ranking. Joel Ervin as a three star was a joke (they changed it). Ben Congdon as a three star was a joke (they changed it). Jasen Lopez as a three star is a joke (I expect it to change).
This one is more defensible. The good news it that most of the best quarterbacks in the NFL had the same ranking or worse in high school.