Manchester United played quite well without Cristiano Ronaldo yesterday, and the coach might prolly want to stick with the team that has earned him his first competitive victory as Manchester United manager, but mind you that Ronaldo is not the kind of player you can keep on the bench for too long, he will express his unhappiness at that openly and will the forcefully seek for an exit.
It is because some change are good and in the yesterday match, Manchester United played very energetically. The appearance of Rashford, Sancho and Elanga brings more energy for their attacking and midfield.
I think the absence of Ronaldo is a signal that Ten Hag actually accepts that Ronaldo is no longer important in his plan for this season. It is not easy to find another striker can score many goals like Ronaldo but United need more than goals. Ronaldo can not match with the requirement of Ten Hag for pressing around the field and in a whole match.
Having said that, in Manchester United's next game i expect quite some changes to the team that won yesterday, afterall Casemiro is now in the club, and he is definitely going to be their constant defensive midfielder, as for Ronaldo we'd have to wait and see how things develop, there are a couple of days left before the transfer market for this summer shuts, if he doesn't exit the club before then, and he commits to Manchester United, then he can be more focused with the team, and the manager will play him much more regularly.
With United now, you can not expect that they will have stable performance. They can win against Liverpool but they can lose other smaller clubs.
Anyway the appearance of Casemiro is very promising to improve the midfield of United especially in defense ability. If he can cover Bruno Fernandez, he will help to release Bruno for more focusing on attacking. Then United's midfield will become stronger and better in attacking.