I think what is interesting is that as the NBA 3 pt revolution is proving, when defenses have to stretch to guard longer threes, often the cost/benefit analysis of giving up a few % on your long threes is more than balanced by the additional space it creates in the defense, which can be very easily exploited.
Obviously you have to be able to hit a decent number of them, but I think we are seeing in the latest iteration of basketball theory, the math works.
The point being, regardless of where the college 3pt line actually IS, it may actually make total sense to set your players wider and use that to stretch the defense beyond its comfort or breaking zones.