Hill's route running has proven to be raw mainly because of the scheme he's operating out of. He's simply not running the amount of routes that others are and that's why some are knocking him.
However, he has run routes such as Dig, Post, Hook, Out, Arrow (flat) and Corner patterns that he'll be asked to also run at the next level. He still has a lot of learning to do in this aspect of his game because he doesn't have the details of it down yet.
Despite this, he's going to the NFL where professional coaches will have more time to teach him and it will be his main focus.
The ability to separate from defenders when running routes is key at every level of football, but perhaps none more than at the NFL level because defenders are just as fast and quick. Although the scheme and route running that Hill has had to do in college is limited, there are instances in which his ability to break down is showcased as well as his ability to separate from defenders vertically.
He shows that he can get vertical on defensive backs and create enough separation to catch the ball. On short and intermediate routes, he shows that he can break down his route within two or three steps, sink his hips and get open. Examples of this can be seen on Hook routes.