Lucky For Manchester United they still have the time to get another player I could feel that row as it transfers and is still open because even though the attack is good they also have to have a solid defense to avoid conceding goals when their attack scores. This was one problem that Chelsea and Manchester United faced last season. Ten Hag has to prove himself as he has been given another chance.
If you look at Manchester United's performance last season I think it was not entirely Ten Hag's fault that they achieved bad results in the premier league. The many injured players made the team's game very bad because they could not adapt to the coach's tactics. But on the other hand Ten Hag must also be responsible as the head coach because he could not build a solid squad and rotate his players when other players were injured.
But now that some of the team members of the club will be should missing and a new coach in place with new ideology and relationship. I think they will not be contenders this season. However, they will still make top 4.
Liverpool were not in a bad condition last season. I think with the change of coach they can still maintain their performance like last season. Slot should be able to maintain Liverpool's performance because they still have the same players as last season-CMIIW. I am also not sure about their chances of being a title contender this season but if Liverpool get a good start to the season I think they will be one of the favorites to win again.