I can't agree with either sentiment here. We've scored in every EPL game since Kenny returned, and we've kept a lot of clean sheets as well. But the truth is that without Agger we are hopeless at the back, because the vast majority of those 13 goals against have come when he's been off the field. One's defense cannot possibly revolve around a single player, but his fitness is proving to be the difference between winning and losing. WBA weren't even in the game before he went off, and in his last seven appearances we've no conceded a single goal while he was on the field - yet we've lost 3 of our last 5 games.
We're doing okay defensively, and okay up front, that's all; but we're right on that line that reads "squad holding together". What I'm more worried about is that our squad is not capable of playing the kind of football we want/need. Being unable to string 5 passes together without a hoof, and being overrun by a Hodgson-controlled bottom 1/5th of the table club is a far larger concern than our injury-hit back 4.