This is what he's been doing during the last two or three months. The game against Liverpool, being the one exception.
He's now becoming more of a complete midfielder, with much more responsibility in all areas of the pitch. Played something between 45-50 passes per game at Juve and was more of a final third player. More than 70 per game now (only Henderson is playing more in the PL), so I wouldn't expect him to produce the same kind of goals and assists numbers at United.
I don't think they have any issues in midfield right now. They do need to find good replacements for both Carrick and Zlatan though, and that's going to be very difficult.