I think the lack of depth talk is being taken too far
Attack: Sesko, Zirkzee, Mbeumo, Cunha, Amad, Rashford, Dorgu
Midfield: Bruno, Mount, Tielemans, Mainoo, Santos.
Defense: Maguire, De Ligt, Yoro, Heaven, Mazraoui, Martinez, Dalot, Shaw.
You can pick two completely separate teams from this group to take on Arsenal and City on a good day and they'll give the opponent a good game.
I'll like to see us get another midfielder but I'm not even sure if we should be targeting a big profile, and for the left back situation it's not so desperate Maz, Martinez, Dalot and Dorgu can cover there. We've seen Yoro looking solid at right back so that helps the rotation if we use Maz or Dalot on the left.
As for the midfield Tielemans, Mainoo and Santos is a good rotation when you also factor in Mount ability to play there. Actually if we buy a big profile there someone will be in similar situation as Mainoo in the first half of last season. I'm not saying we shouldn't I'm just saying it ain't that bad.