few thoughts from a 1st half only watcher:
OSU secondary played soft.
OSU o-line cannot pass block well enough.
too many personal fouls.
I agree, Tressell did not have the horses to win the game. Even with 0 personal fouls they'd have lost, though it would have been closer. To me, it isn't just speed though. Similar to last year's game, OSU lost the battle in the trenches, badly on some downs.