I noticed that he misplaced a few easy passes and was rather wasteful. Poor decision making and execution of rather easy plays, indecisiveness, etc. That will most likely go away when he builds up some self esteem but to be honest, he never really went through difficult personal situations at Dortmund so who knows.
However, I also thought that he ended up in lots of one on one situations around the corner flag. Those aren't his areas and I think he doesn't look like a world beater in those. Sure, he can go past a defender but he lacks the speed and physicality to fight them off once he's done that. Also not a particularly great crosser or anything like that. It's even worse on the right wing. People will probably still be disappointed then. I also think that it will be an issue that many of your star players - Bruno and Pogba in particular - attempt the deadly pass at much earlier stages in the build up than Sancho who's intrinsically more patient. Neither is he a player that makes the runs or has the brutal speed those two love in their team mates because they can feed them with passes behind the lines.
The question is, how will he adapt? I imagine in order to not become too discreet he'll also attempt to makes his plays earlier, he also might improve physically and in isolated one on ones. But those are different disciplines and the aspects of his attacking play that he excelled in at Dortmund won't be utilized in the same ways. You basically seem to be planning to develop him into a different player, effectively setting him back a few steps in his development. If you intended him to play like this, you really should have gone for Coman instead.
Personally, I hope that Solskjaer will be sacked before long. This is a seriously great squad and I can only imagine what Guardiola, Klopp or Tuchel would get out of it.