I think we can safely say we have enough cover at GK, RB and midfield. I even think we have enough up front with Rooney, Sandro and then DCL, it's just whether you want a typical CF type but that is what DCL is expected to be. Out wide we have enough players but not necessarily a lot of quality.
We definitely need a long term successor to Baines and an additional CB although you could argue with Keane, Williams, Jags and Holgate we have enough deither there too, albeit again not enough quality.