The 24/7 access argument is way overrated in this discussion, in my opinion. Gopher basketball players can get up shots just about anytime they want. Among Williams Arena, the Sports Pavilion, the Bierman gym or the rec center, or any local Lifetime Fitness, chances are if a guy wants to get up 1000 shots, he will be able to. Basically, if a guy is committed to improving his shot, he currently has that ability.
These new fancy practice facilities are more things besides shooting. The really good ones have unbelievable strength and conditioning capabilities, a nutrition/diet center, a sports medicine lab, a players' lounge, a game room, a study hall, etc.
Above all else, these new fancy practice facilities are about recruiting.
Frankly, in the grand scheme of things, shooting ranks far down the list as a reason to invest $20 million into a new facility. Guys can shoot basically whenever they want now if they are willing to commit to it. What the Gopher players need is the new training, nutrition, and health resources their Big Ten brothers are getting. What the Gopher coaches need is the ability to use such a facility to help them recruit, or at least get to even footing when compared to their Big Ten brothers.