You don’t stop improving when you’re 21 years old. In fact you haven’t even reached your peak at that age. Homer is a hard worker, and he will continue to improve.
Sometimes observers seem to view people statically. In other words, a picture of them as they are or were, not as they could be. Especially with someone as singularly focused and hard working as he is, one has to take into account the likelihood of continued improvement.
He is a solid draft choice. I’m not a draft expert, but I’m thinking somewhere in the 3rd to 5th round. I don’t see him going any later than that. We shall see.
Don’t be surprised if he’s a solid back for several years, barring injury.