i dont know how college baseball bats relate to slow-pitch softball but i can tell from experience, it make a HUGE difference in softball. you can get a "hot" bat by having it rolled providing significantly more pop to the bats. often, these types of bats do not hold up to the test of time resulting in structural breakdowns of the bat, sometimes dents, sometimes splits in the bat head itself. a dented bat can still be used and retains its pop until it loses its structural integrity totally.
to be clear, i am not saying that is what took place here, merely, i am giving my knowledge of what is done to some softball bats. its kinda pathetic people go to those lengths to make an otherwise legal softball bat illegal (illegal to the game), but people DO go to try to gain an advantage that way.
it will be interesting to see if it affects their hitting, but i doubt we see any sizable change other than fewer home runs, but that will mostly be due to the size of td ameritrade more than anything. if there is a noticeable loss of pop in their bats, there will be strange things afoot and tomfoolery might be a valid suspicion.
again, i have no idea how this translates to a college baseball bat....let that be clear.