The quality of a GS event has nothing to do with the winner. The USO 2012 wasn't the worst Slam in recent memory because Murray won, but because the scheduling was catastrophic, and the quality of the tennis in the late stages (SF and F) absolutely shocking. Also, it had the worst 1st round of a Slam I can remember with plenty of crap televised matches. All in all, very few memorable matches and most for bad reasons (ie Cilic's choke).
Nah, Cilic didn't choke. He just realised he was facing a all time great and bowed. Naturally in retrospect, Cilic is perhaps a prophet of the ATP.