Huth is still injured, calf I think. I would say though that even when he comes back, he is likely to need a bit of time to get back up to match speed.
Re the atmosphere. I would agree that the crowd is quieter. I think it's because our expectations, as fans, have increased. For the first couple of years we were the plucky under dogs, sticking it to the big teams. We as fans responded to that by roaring them on accordingly. We are not the under dogs any more. We're not just happy being in the prem anymore (as a collective) we want to see great football too. When the team isn't performing, we're pretty quiet. In that way we're similar to other prem teams, aside from the newly promoted teams.
I'm not saying that we shouldn't want entertaining football and obviously this is just my opinion. I think this is one of the things that lead to Pulis leaving (a necessary event to move us on) too.
Also, I hate that away fans sing Delilah at us at a volume reminiscent of how we used to be. Adds salt to the wound, so to speak.