points. You say that if the D loses one player it ruins the entire defense and we shouldn't blame Tuiaki. Which says that they are not deep. You then ask what about the offense losing a key player, which they did, how would they be. They were deep and did very well. So either way you look at it you can blame Tuiaki for the terrible defense we saw at times this year.
He didn't just get hired, he has had plenty of time to build "his" defense. He should take the blame.