I disagree; the pre season games does not give any picture or indication of how the team performance will be when the season starts. Instead; the pre season games is to get the players to up their fitness level; understand the weakness of the team and work on it greatly. The MUFC pre season game against leeds was good. Some academy players did well performance wise. More to expect.
from my point of view, pre-season matches are one of the indicators for the coach to see that the new players who have been brought in can adapt to the existing squad and blend their games with other players in pre-season matches. Even in pre-season matches, the coach will usually give playing minutes for second-tier players or for academy players to play in pre-season matches to measure the quality they have. It could even be the right moment for academy players to break into the main squad next season if they are able to perform well in pre-season matches.
On the other hand, we have seen Manchester United perform quite well when they beat Leeds United, where the final score was 2-0 for Manchester United's victory. What caught my attention was the Manchester United goalkeeper where Erik ten Hag is still testing his goalkeeper skills in this pre-season game.