If you look at our team as it is right now, it's clear to most of us that we're a few crucial cogs away from the ideal set-up. As much as I love Barry, I think he's starting to show his age a little, possibly due to his recent injury. He was never a fast player, hence, why Nige was such an excellent option in the squad; but lately a holding midfield of Gareth, Yaya, Garcia, Rodwell seems woefully slow. It's unlikely to be addressed until next Summer since Rodwell and Javi Garcia have been brought in, and that's what we have to work with.
So, point one was lack of a faster, aggressive holding midfield who can recycle possession. Secondly, and, probably most importantly given our current lack of creativity, we need a deep-lying playmaker. Poor old Silva is too heavily relied upon to create chances. I'd echo what others have said, Nasri has been disappointing: he's tidy but he's not nearly good enough to be our sole creative player when Silva's out. The problem could potentially be solved by bringing in Isco, but then he'd likely bench-ride when Silva's fit. We'd still only have the one creative spark on the park at a time, unless Isco was to move out wide.
Thirdly, a complete lack of pace and width. I know Mancini is married to his full-backs providing width; hence why our only pacy winger is Sinclair - the definition of a squad player. Rather than faffing around with three at the back as our 'tactical change' I'd love to see us purchase a pure out and out wide player who could a) deliver for Dzeko/Aguero/Balo and b) stretch the opposition allowing players like Silva/Nasri more bloomin' room in the middle. That way we could stick with our 4-2-3-1 which works very well as a tight, unified, system, but be able to change the way we play within it via personnel changes, rather than going to 3 at the back in a blind panic and having half our player swapping positions.
So which players could we purchase to provide these options, preferably realistic targets at sensible prices (no football manager ridiculousness):
Daniele De Rossi - would solve problems one and two above, able to recycle possession, not a slouch, great range of passing. Issue still remains whether he'll ever leave Roma.
Arturo Vidal - again solves one and two, possibly to a lesser extent as he's not a playmaker, but he's certainly got a similar range of passing to DDR. HOWEVER, unlikely to leave Juve so I'd say a pursuit would go nowhere.
Benat - solves our creative issues, would likely form a good partnership with Silva, likely to be available at a good price - would be my priority
Isco - Similar to Silva, could alleviate pressure when Silva's side-lined but may end up another version of Nasri + they can't all play in the same team; available at a good price due to Malaga's financial woes + 17.5m release clause
Gareth Bale - The marquee signing that would solve our lack of width and pace. I'd love him, however, he'd obviously be costly and with Real Madrid, rags etc. sniffing around no guarantee he'd want to come. To be honest though his signing would open up a whole new facet to our game + he's UK home-grown so all-out pursuit if I was Marwood/Mancini.
Hatem Ben Arfa - In my book a better Nasri; only really suggesting him as a luxury buy. He provides movement and when he runs at defenders at pace he cause all sorts of mayhem and open space. His work rates also improved beyond the moon.
So, long post, but in my book we could improve simply by snapping up Benat in January.
Then next Summer go hard for two high profile signings - Bale and DDR/Vidal.
As for outs - next Summer I'd say we could be saying goodbye to Kolo, Balo, Milner/Barry (preferably Barry currently for me), Nasri (if he doesn't shape up)