For us tactical nerds, some stattos evaluated Silva's formation/play style and it was a very lose 4-3-3 which was more a 4-2-3-1 on the ball 4-1-4-1 off it. I think we are going to see a lot more of a flexible and tactically fluid formation than our shit formations/tactics of late. The main philosophy is actually having energetic players that are very comfortable on the ball, can receive it, move with it and pass it well, so based on that, we need half an outfield:
Coleman ..... New CB ..... New CB ..... A fit Baines
New DCM ........... New DCM
A fit Sigurdsson
Walcott ............................. ... Lookman
I would say we need a new heart. We need a quality central midfielder imo, a proper leader that actually knows the game and can interpret managerial instruction. Perhaps someone on the same wavelength as Silva and can speak the lingo and pick up the detail that may be lost with others. A presence, and someone with a lot of experience, respect and a good age. Carvalho for me ticks quite a lot of those boxes.