Think it's fair to say a change of system to play wingers could be on the horizon next year. Sell Isla, Gio, Quags or Llorente (depending on performances) and Vuc. If Isla comes good this season i would consider cashing on Lich if by some miracle Isla out performs him which is higly doubtful. Cacares and one of Isla/Lich are good options for right back. I put Llorente in there because Conte does not fancy him right now and his performances could be bad for us if given a chance. I think Llorente should come good but u never know.
If he changes to a 4-2-3-1 Tevez can slot in as SS. If it's a 4-3-3 Tevez would be wasted on the wing so where would he play and would he be keeping Llorente out of the team then?
Bring in a LB in Zunniga, I think Ogbonna can play LB to so that could be great options for the LB. For Centre mids we have pogba, Vidal, Marchisio, Assamoah and Pirlo if he stays on longer so we are well covered there. I'll be honest I am lost for wingers that are in our price backet than can improve the team. Mata is the only one i can think of that that might be available next year, he will probably cost to much any way. Could try for Schurrle and De Bruyne if they dont get much game time at Chelsea. Strikers i am not to sure on right now, may not even need one come next season. Most of the good ones cost a lot of money that we probably dont have. Maybe if Gabbiadini comes good this season we could try him if needed.