Depends on how you viewed the game today i think...
For me it looked alot like this (changing to 433 later and quite fluid)
Pickford
Coleman Mina Holgate
Sidibe Sigurdsson Delph Digne
Bernard
DCL Richarlison
With Coleman and Holgate coming down the flanks with the ball and then reverting to a back two when one pushed up the pitch. Reminded me a bit of Sheffield United...
I think perhaps Gbamin would be a good option as a centre midfielder if we went with that because he can slot into the defence allowing both full backs to push on.
Id definitely go for Tonali or a similar profile of player...very good all rounder and not just the passer i thought he was at first.
A centre back and a centre mid and I'd be happy in Jan