I partly agree with Alcarez if you had european football this season. The injury crises United had this season combined with all the new blood and staff would be too much imo. Altough next season I reckon most players brought in this season would've adepted to the EPL physicality (which is needed for players like Blind who came from the Eredivisie).
I think however that next season United will have less injuries, because the staff knows how to train their team now, players who came in this year had a year to adapt plus everyone will have a summerbreak.
About Depay, I think he could become as good as Robben. But at the moment he's too inconsitent. He has games where he plays very good and is very decisive for his team, but often he's in a tunnlevision and he won't go for the pass when needed. He's a bit too selfish which leads to occasionaly playing a bad match. He is very strong though, has a good dribble and a great shot. I think he's current top goal scorer of the Eredivisie, while he was out of form for quiete a while, while he had to play in the Europa League and went to the WC.