Kevin Prince Boateng should be able to play naturally RW
Nigel De Jong should have his passing upped to about 15 or 16 (has a pass completion of 92% and averages almost 60 passes a game)
El shaarawy should have his passing upped to 14/15 (pass completion of 85% and averages more key passes a game than iniesta) and should have dribbling of at least 17 as this guy's close control is impeccable.
Zapata deserves upped passing (90% pass completion from an average of 45 passes per game)
De sciglio deserves a CA upgrade for sure due to his breakthrough season. Realistic stats would be 15 anticipation, 14/15 crossing, 12/13 dribbling, 12 marking, 15 passing, 15 tackling, 14 off the ball + positioning, 14/15 decisions, 16 composure + workrate, 14 acceleration, 16 sprint speed and 13 strength.
Fabio Borini's finishing should be lowered to 15, his determination should be upped to around 17/18 and his stamina should be upped as his fitness has improved a fair bit
Joe Allen deserves a better first touch, I do find him a bit overrated but his touch is pretty class.
Jordan Henderson's determination should match his work-rate
Maxime Gonalons should be CA/PA upgraded. Deserves a passing, tackling, composure and decisions of at least 16 (he is one of europe's most successful passers in relation of quantity to quality).
Dejan Lovren should have his passing raised to 14 and his consistency lowered to 9 or 10
Alex Lacazette should be a natural RW
Grenier should have free-kicks of 15(although he only scored 2 this season, they were both pretty special), pace + long shots of 14 and finishing of 11.
Yohan Gourcuff should be able to play LW.
Lisandro Lopez should be a natural LW as well as ST
Aubameyang should have 17 pace and 15 dribbling
Jeremy Clement should have 16 passing (87% completion from 58 passes per game)
Max Gradel should have dribbling of 15/16, a passing decrease to around 9 and work rate of 15/16
Thomas Muller should get a bit of an increase in passing and dribbling, 14 would be realistic.
David Alaba should get a slight passing increase (90% success from 54 passes per game) and a tackling of at least 15 (averages a foul every 4 tackles). I also think he deserves a pace increase as he does seem to be incredibly fast, e.g. at times he looked faster than walcott when they were playing arsenal.
Cesar Azpilicueta's Off the ball should be increased as he gets forward a fair bit.
Kevin Volland should be able to play AMC naturally
Takashi Usami should be able to play LW naturally
Rodrigo (Benfica) should be accomplished at AMC
Robert Firmino should have his tackling upgraded to 11
I personally feel David Luiz should have a passing and flair of 15/16, his technique should be higher, his dirtiness should be upped to 15 and his decisions and aggression should be lowered to 11 and 15 respectively.