Exactly, that front 4 would shit on our attack and we don't have a CM who can keep the ball like Banega.
Like you said, it's a team sport. It's unfortunate and also weird that people think single player wins trophies or single player controls the game.
Ideally we should be in a position like City where you can replace any player, you still don't see drop in level. We are so far from that.
But it's fair to recognize when a player is an issue during crucial phases of the game. And in the case of Bruno it's an issue that exists since 2020, at the time people thought fatigue was the main culprit for his inconsistencies and ability to disappear for large periods but in 2023, what is the argument? For large periods of time United play with one less player in midfield because Bruno is not being useful.
Now it's true that he isn't the only issue, Casemiro positioning is often terrible, he positions himself too high, too wide or both. Eriksen is very useful in the early stage of our attacking transition but he often disappears when the ball is in the final third and he is generally a lightweight defensively even though his positioning is good.
Personally I can't forget Bruno's game against Barcelona, by being pushed aside his flaws kind of disappeared and he was in a position where his creativity and aggression were emphasized. For months I have thought about a small tweak with the following formation:
-------------------Hojlund
Rashford-----Antony--Bruno
----------Casemiro--Eriksen
Shaw-Martinez---Varane----Dalot
------------------Onana
The logic is basically an assymetrical diamond that put Rashford, Bruno and Antony in roles and areas that actually suit them. And making the center of the field a nightmare for the opposition
-Antony(Mount) main strength are his ability to keep the ball under pressure and link up, his pressing and willingness to tackle which to me that makes him ideal for a central role and as a potential leader for our pressing.
- Bruno main strength is his delivery, he is a menace from all depth and playing slightly wide on the right side should allow him to target the box faster and easier than if he has to get the ball back to goal turn and create, he is a bit too slow when it comes to that movement and our transition often dies at that point.
-Eriksen(Amrabat) is ideal when he starts our transition and focus on cutting passing lanes, he needs to be a bit sheltered from physical battles but that's where Casemiro comes in, ETH should stop that box to box nonsense, we need a sweeper in midfield and he is very good at it, allowing him or asking him to be more than that hurts our midfield, it hurts the shape of our midfield and we end up being late on nearly every transitions. The dynamic between the CMs should be that Casemiro drops when the ball is in the final third and Eriksen drops when the ball is in our third, they basically cover each others weaknesses.