As much as I agree with all of that, our problem on the whole hasn't been going forward and creating chances. We created enough to win 2 matches yesterday but just couldn't kill them off when we were 1 up. Our problem has been defensively and ironically the players you named would probably be the 4 you'd pick for a game where you wanted to be as solid at the back as possible.
Regarding the talk about Mascherano; clearly he's not going to offer us as much as somebody like Gerrard going forward but I do think some people are underestimating his ability on the ball. Generally he keeps it simple and plays within his means but he is capable of hitting the odd 50 yard pass (as he done several times yesterday) or breaking forward and playing the odd through ball. Saying all that, he is at his best when he's got somebody more creative alongside him and without knocking Lucas too much (because as I've said before, he's been far from our worst player this season), he isn't good enough and like Pigeon says, hopefully Aquilani can provide that alongside Masch and allow him to go back to his best.