Tbh schweinsteigger bossed us in the past, so has most of the barcelona team, we're just going to have to park bus, narrow down and hope for the best on the break. It's what we've been doing to stronger teams in midfield for years.
With Willian+Mata. I think that Mourinho did originally say that He wants to turn Mata into an inside forward, or at least get him to cut in from the flank, problem is that he has no pace, but I think that Mata is smart enough to adapt to the movements, it would help us in keeping possession in the final third as well which is another option, although I still think we're best with fast wingers and a natural playmaker in the middle like mata/oscar.
Willians best role is a free role, drifting from flank(left flank best) to the middle where its hard for him to be picked up, he would be great there if it wasn't for the fact that hazard plays on the left and Mata has a pretty free role too. The 4-2-2-2 he played was interesting, so was the 3-5-2/3-6-1. Hopefully we play that some more this season.