That's overly harsh. Leak was a drop-back passer, but he was still mobile and we used his athleticism on roll outs, etc. He was still able to do some of the zone-read stuff with Meyer. He wasn't John Brantley.
He slid because he knew if he was injured, we would have been fucked. I remember in 2010, Brantley tried to show his "toughness" and pick up a first down against Alabama when the game was already over. He cracked his ribs, and our offense went to completely shit after. Should have been smart like Leak and slid.