Manchester actually got lucky and it's fine to say they escaped, if you did saw that game you will agree that Manchester wasn't stable enough, grey got carried away thinking they were going to win the game without much stress probably their opponent isn't that tough and to make it real they had early goals which helped them to get relaxed until they got equalized in the same first half, after the goal Manchester United has in the second half, they weren't having good attempts as much as bodo/glimt, so they weren't in their best and they somehow got lucky.
Yeah it was a really difficult win for the Red Devils. It is totally because of trying to adapt to a new system of Amorim. He loves 3-4-3 and 3-4-2-1 formations. He wants to make it work at Manchester United as well. But it will take time as it isn't a system they are familiar with. Otherwise I believe they could have beaten Bodo/Glimt much easier than this.
Hojlund seems really contented with the new system though.
I have seen a comment of him after the game that he was glad with the formation with 3 defenders. He says he plays more comfortable in this way.