Also: consider the kind of guard that ends up a highly ranked player - tall, physically sturdy guards or high scoring combo guards who aren't points at all (like Brandon Knight). Very few pass-first PGs get up into the higher levels of the rankings... I think Naadir Tharpe's really good, but he's not a top-40 player b/c he's not that great of a scorer or that big. Kendall Marshall was one of the best freshmen in college ball, but was around a 30th ranked recruit (and he is tall).
If Jevon can handle, pass, lead a team while not getting clowned on defense, he sounds like a good fit. There are enough scorers on the team; the Johnnies are gonna need a facilitator.