JO has the slowest release of any major college 3 pt specialist Ive ever seen. In addition, ive never seen a supposed 3 pt shooter with as bad a position before and after the shot as him. His shoulders are rarely square to the hoop...his feet are never in good position....and he floats away from the hoop constantly. Contrast that with a guy like Kent Macausland who was the most unathletic player in iowa history, but had a quick release on his shot, was always in a good shooting position, and had the same form on every shot. Thats why hes the leader in all time 3 pt % and in the top 5 all time in 3pt makes.
If the guy cant do what he was given a scholarship for, then find someone else who can.