I agree with this, look at uni and Wisconsin, a lot of years they are not overly athletic but they still seem to be able to play pretty good d.
Wisconsin and UNI don't have a guy like Garza hedging out 20 feet and getting burned over the top and they don't sit back in zone. Mostly UNI/Wisconsin don't get into running games with teams like Michigan. There are recipes for winning with the guys Fran recruits but the other successful teams like UNI in past and Wisconsin in past don't involve a lot of zone defense and hurrying the ball down the court on offense, or trapping half court.
Rock has a good point about the only option is to do zone with Garza/Jbo. The guys Fran recruited for next class are more athetic so they should defend better. The question is they are rated low, so they have to have more offensive skills than their ratings suggest to be successful. Fran either got steals or busts.