This is the same team we saw at the beginning of the year: No athleticism in the back court means inability to prevent dribble-drive penetration, resulting in lay-ups, easy dump-offs and wide open three's.
Crean had it right. This team over-helps on penetration, but, what he didn't clarify is that it has no other choice. When you have no one on the perimeter that can stay in front of the ball, the rest of the team simply has no choice but to be out of position.
Fran can tinker all he wants, and rant and rave, etc., etc., but when the pieces aren't there, they aren't there.