I don't think we need to worry yet but there is certainly a feeling worse than the rough patches of the past that this might be a rough season. Our best players seem to be MIA in the CL and in say, Sandro's case, is completely off the hinges this season which is scary considering we have absolutely no right back attacking power so its all on Sandro. The whole point I thought of Mario to lock down the left is so Sandro can at least attack the space. Poor Mario is working overtime on that side.
I don't know why we don't try to attack down the middle more often. Really need Marchisio in there.
I also get the feeling we have seen the last of Bencantur for a while with Marchisio back.