We need another striker, right back, left sided midfielder, and defensive midfielder.
Tevez, Johnson, Silva and Barry fit that bill. I'm on board with three out of those four.... Johnson is the exception.
I think there are still serious question marks over his defensive capabilities. If Carra was having a go at Arbeloa for roaming forward and not tracking back enough, then people should watch Glen Johnson for a game. Think he's literally get punched by JC!!!
Also, I recon there's mentality and attitude problems there to be honest - he tried it at a big club, and didn't like the rotation, and got moody with it. Maybe he could step back up, but I get the feeling he enjoys being a big fish in a small pond, not the other way around!
As always though - I could well be wrong, this is only my opinion and I'd love to be proven wrong. That hasn't happened yet though!