Despite yesterday performance (which wasn't all that terrible btw but if Mane was there they would have lost 4-0 considering how exposed they played on the 2nd half), I guess you can finally say Mourinho found his base team at Manchester United.
Phil Jones and Marcos Rojo being better than average as center backs continue to shock me but they are definitely a solid partnership. Quite frankly I don't see how their biggest need is center back (Lindelof and Manolas rumors) right now. I see certain positions that definitely need replacements as a game like yesterday exposed them. Carrick is essential for them but while he can play against teams that don't press, he doesn't fit against the better teams. So that's one position that needs a replacement, but who's available in the Summer that is a great player at that position? I can't see any defensive midfielder that can replace what Carrick does for them on the market.
Then you have to consider Ibra is not getting younger and could drop off next year, so they need someone upfront as well. Martial makes me scratch my head because yesterday he should have been much more active but failed to grasp his opportunity (as he has done so many times this year). In my opinion Darmian played very well but when attacking he doesn't bring anything to the team because he doesn't have a left foot, he always brings the ball inside to cross (allowing the defender to recover) or pass the ball. Considering Luke Shaw seems to be on Mourinho doghouse, they need someone else (I still think Blind can do the job though).
So next year: DeGea; Valencia-Bailly-Rojo(Jones)-?; ?-Herrera-Pogba; Martial?-Mkhitaryan-Ibra; Bench: Darmian, Rojo(Jones), Blind, Mata, Winger to buy because Lingard isn't good, Carrick, Rashford; Fellaini