I think DT is such a premium position that you take a risk with a kid like him. The DTs are the linchpin of Diaz's defense, so it's the one position where you want to have as many options as possible. Maybe someone gets injured or the other DTs aren't as dominant as we thought they'd be.
I would avoid low character kids as Miami doesn't have the leadership it needs there, but it doesn't sound like Collins is a bad kid. He's just lazy. If a coach making several million dollars doesnt believe he can figure out a way to motivate a lazy high school player, he shouldn't be in the coaching business.
This will probably get me some down votes, but Collins attitude reminds me a lot of Olivier Vernon's. Talented players, but seem to be the type that don't see a point in putting their bodies on the line without a good reason. That being said, I can see Collins being motivated enough to play hard for 3 years in order to be able to leave early for the NFL so he can get paid.
