You're simplifying a complex issue.
Short answer to that is No. Maguire is not suited for a high line. However one need to acknowledge that a successful side have balance . That's why the last time we won the EPL we did so with Cleverley (the football equivalent of a lawn mower) in CM and with a cadillac ( Pogba) on the bench. Scholes and Carrick were better then Pogba but lacked legs, something Cleverley provided in bucket loads.
Therefore if we play Martinez then someone else must pick up the tab in terms of aerial duels. That can be achieved in two ways
a- bring the typical giant CB like Maguire or Tarkowski in. That's hardly ideal as they tend to lack the characteristics needed to play in a high line
b- add inches across the board. Which I think ETH had now learnt to do having fecked up loyally before with Malacia (5ft7) and Martinez (5ft10). Mazraoui is 6ft, Hermoso is 6ft, Ugarte is 6ft, De Ligt is 6ft2, Yoro is 6ft3, Zirkzee is 6ft4 and Berge is 6ft5. You see the pattern?[/B][/B]