Walker got in some decent challenges in the back 3 (put off someone's header as part of that - Maguire's aerial presence a miss).
It might push Trippier up a bit. Could have 5-3-2 with the 3 being Mainoo, Rice and Bellingham, with Foden in an area, slightly left of Kane. Harsh on Saka who starts well, but then gets marked and England don't work to get him space.
Saka at left wing back seems a bit of a stretch.
But yeah, hard to see Southgate making such a change. It's other things that are mostly the problem.
Tempo, transition, fluidity of movement, players not in their best roles.