I dont think its too far fetched that we can work a system with Bruno and Grealish within a midfield 3.
We have 2 fullbacks who's offensive output leaves a lot to be desired, but i think we could use them in a different way based on their skillsets.
Assuming we sign Sancho, Grealish, and someone like Partey
As default, when out of possession
DDG
AWB Maguire Lindelof Shaw
Partey
Bruno Grealish
Sancho Rashford
Martial
When we are attacking, in possession;
DDG
Maguire Lindelof
AWB Partey Shaw
Bruno Grealish
Sancho Martial Rashford
Effectively asking AWB and Shaw not to bother going forward as they dont have the quality, instead move into DM roles either side of whoever we sign for that role - Partey in my example. Giving full licence to those infront to be fluid, interchange and create.
I think Pep did a similar thing at Bayern.