We saw Mbeumo - Mount - Cunha trio in the attacking line today. I was waiting for Sesko on the front though. I can't say the general performance of the Red Devils was bad. They played quite well actually.
The only player I didn't like was Altay Bayindir. They conceded that goal because of his own mistake.

They could have got at least one point. But they should have been able score at least a single goal after all those attempts too...
MU played more entertaining today. The problem is they get bad result compared to their results last season. They always got draws against Arsenal in last seasons. Hard to call it's an improvement considering they're improved a bit in term of gameplay, but downgraded in the result.
As for Bayindir, yeah it was his mistake, but he's also performing consistently in this game. His club could conceded a few goals if he's not also performing quite consistent in this game. He needs to improve asap as his club's defense is still quite shaky.
He's also helping the club with his on point long pas. However, he's not good enough, and i'm doubting them to sign his replacement at this point.
Truth be told I was really amazed as to how Manchester United actually played that game against Arsenal although like you said the result is the main thing and if the result is saying otherwise then all those game play was for nothing and that's exactly what happened to them but the bright side is that you can now be able to watch Manchester United and actually expect a good play from them and maybe they will convert the good play to good results too.