I could be wrong, but I though Coach passed a comment at the beginning of this season that the Staff had kicked tires on a few Grad Transfers this past summer, but either on the player side or on UM's side the fit wasn't there? If that's true, then that indicates the Staff would be open to the idea ----- for the correct player.
I agree with you, Beilein's system is very complex and that decreases the likelihood of a "one year rental" being able to star at UM. And I agree with you PG is the toughest position to master in his offensive system. All that being said, I wouldn't be surprised if the Staff kicks tires on a 5th Year backup PG/combo guard type to provide experienced depth at the guard slots.