Without Rashford, Man United played more freely, attractively and solidly. It can be seen that no player is selfish in forcing themselves to score goals. Everyone is trying to work together and this formation clearly has to be evaluated by Erik Ten Hag. I see it as an improvement in being able to play players who are often on the reserve side but are starting to be motivated to be able to enter the main squad. Make no mistake, if Erik Ten Hag likes this composition, he will try it in the next match.
Marcus Rashford upgraded himself a lot and he scored more goals for Manchester United in the last season but he is still not a good striker. His skills are more appropriate to play at two swings of Manchester United, not at the striker position. One of reasons the club bought Holjlund is to use him at the striker position and let Rashford moving back to his favorite positions.
Rashford still needs to sharpen his finishing skills more and his decision making ability. Sometimes he made bad decisions after considering whether he should make a shot or a pass or assist to his team mates. His shots must be more accurate too and it is related not only to his finishing skills but also his emotional control and how he deals with pressure.