Some thoughts on Mejbri
If you're judging his performance on whether how influential he was by chances created, dribbling past players, or even getting on the ball a lot, then you would not say he had a great performance. However, in the limited touches he had on the ball, he was the most impressive of the lot. 95% of the time his touches were great despite having a defender being physical from behind as he was coming towards the ball as a #9. I contrast that with Puigmal and Elanga. Puigmal was put in similar situations and he did not handle it well. He wasn't able to retain possession and link the attack because defenders outmuscled him. Elanga was almost as good as Mejbri in these situations and felt he was the 2nd best in that area of the game. Although his touches weren't as clean as Mejbri's, he did well to win fouls and help United retain possession.
This is important because this physical part of the game is going to be an adjustment when playing against men at first team level.
If you go back and specifically watch out for these instances, I feel you would agree with me.
Was impressed with Mengi and Bernard's ability to play out from the back. Bernard has improved a lot in that regard. Not sure if it would translate at the senior level as it is here like Mengi's would, but it's impressive he has improved this much regardless. Laird was definitely a mixed bag. He had the right ideas a lot of times, he just didn't quite have the sharpness to execute them or it could have just been one of the days a battle was just a cagey battle.
Galbraith was the standout for me. He looked the most assured in possession giving himself a lot of time, compared to Garner and Levitt.