I like that Kudus idea if we sign a more defensive minded midfielder and sign Sesko, though it's putting a lot on Eriksen still:
Centrally, we'd have:
Martial/Sesko/Kudus
Bruno/Kudus/Eriksen
Eriksen/Fred/#6
Casemiro/#6
it looks pretty good if you plug say Caicedo, Rice, Zubimendi, Brozovic, Lavia or Locatelli in there, i.e someone who can cover Casemiro but also start next to him because he can pass
So a summer of say:
Out - Maguire, McTominay, Wan-Bissaka, Pellistri, De Gea
In - Sesko, Kudus, DM/CM, Frimpong, RCB, Sanchez
and Amad probably goes on loan one more year if Sancho stays.
6 players seems like a lot to bring in though, even if we get say 85M for the 4 players and save big on De Gea and Maguire wages. That covers Sesko and Frimpong, though, so the only new money is Kudus, the expensive DM/CM, a young center back and then the keeper. That looks like about 180M still, seems like too much. But the squad is quite good at that point, and any single injury no longer terrifies us as long as the RCB is decent.
But yeah, Kudus can turn and play and drop deep and that would fit with Rashford, though continue to put the goalscoring burden squarely on him. But we'd play decent stuff I think with Kudus up top. And Bruno could get more rest, though he can probably can anyways if we sign a proper DM/CM and Eriksen can start more games and come off the bench at #10 more.