not saying this for January window but in the future i hope we could do something like this, to better the squad (home-grown rules taken into account)
Pantilimon -> Caballero
Richards -> Clyne
Lescott -> Caulker
Demichelis -> Mangala
Defence should be 100% the priority and with these changes we would be replacing three fairly average players with three high quality and high potential replacements. Panti is coming to the end of his contract iirc and Caballero would be top quality backup. Caulker is dependent on how well we feel Karim Rekik has progressed by the end of the season.
Garcia -> Matuidi
Rodwell -> Cabaye
The drop from our first choice midfield two of Yaya and Fern to Garcia and Rodwell is too big. Whilst Garcia has shown signs of improvement this season, we could still get £5-10m for him and replace him with a fantastic defensive midfielder, Matuidi, on a free transfer.
Rodwell has far too many injury problems, it seems as if its every game he gets injured and barring one or two very good performances, he hasnt looked up to scratch. Cabaye is technically brilliant and isnt afraid to put his foot in.
Then we need to see how Guidetti's loan deal goes at Stoke and also if Marcos Lopes impresses further between now and the end of the season/year. If both impress and show that they deserve a place in the squad then no attacking transfers are needed (providing Edin stays).
However if Guidetti doesnt look up to it then we would most likely use Jovetic as a striker as opposed to an attacking midfielder. Then if Lopes isnt quite up to it just yet then i think we should look at getting a speedy left winger, a la Navas. I love Jimmy Milner but just dont think he is a winger and should be kept as a utility player.
Maybe someone like Deulofeu?
Whilst none of these players are seen as 'marquee signings' i think they would all significantly improve the squad.
With that said if any of Pogba, Vidal, Kroos, Reus or even Messi become available then i think we would be foolish not to act.
--------------Hart-------------
Zaba---Kompany---Mangala---Kolarov
--------Yaya------Fernandinho---------
-----Nasri-----------------Silva-------
-----------Aguero----Negredo---------
------------Caballero---------------
Clyne---Caulker---Nastasic---Clichy
--------Matuidi---Cabaye----------
Navas---------------------Lopes/Deulofeu
-------Jovetic/Guidetti---Dzeko---------
Its clear for everyone to see that we have the best first team in the league this year, but its a myth that we have the best squad. With these signings we would certainly have the best squad and would give us the best chance of competing in all four competitions as rotation is key.
I repeat, this is not a suggestion for this window, but between now(if not too late), summer and next january.