I think the biggest issue with all of our CM players is continuity. Allegri tries different setups each time and those really cant get into them team. For me the biggest factor for a midfield to work properly is understanding between the players - that they know when the other one will move, how he will pass or when I have to cover the defence. Most succesful midfields were the one which are playing with themselves for ages. I know we have shitty players etc. but was Arthur ever given a chance to really play for like more than 8 games in a row? no and it can be said about any of our mids bar Loca as I said. Its not only the players but also continuity which gives them confidence and knowledge of how they partners play.
Look at this:
Rabiot 1250/2250 mins 16 starts
McKennie 1318/2250 15 starts
Arthurd 435/2250 5 starts
Locatelli 1668/2250 17 starts
Bentancur 1154/2250 13 starts
We really dont have a starting midfield setup clear yet. Loca would probably who stands out if he was signed earlier, but other than that Max just cant decide.
Now look at Inter:
Brozo 2010/2160 24 starts
Barella 1794/2160 22 starts
Calhanoglu 1473/2160 20 starts
Vidal 425/2160 1 start
Vecino 288/2160 1 start
Gagliardini 422/2160 4 starts
its pretty obvious that Brozo, Barella and Calhanoglu played at least 1300 mins together just in the league, while our highest minutes trio is probably less than 600 mins together.
There is a clear hierarchy there for starters and imo thanks to this the players are used to their partners and play much better.
For Juve :
Rabiot starts 3 games, then he is benched for the next 3, then start 3 games again and is benched again.
McKennie the same, get some playing time and then is out of the squad, then again gains momentum just to play 7 minutes against Hellas.
Arthur plays quite good against Cagliari and Bologna and gets out of the squad for Napoli.
I just cant understand how we can make this guys click (having all their limitations in mind) when most of the time its completely different setup playing.