Exactly I think if you have to pick between an AM or DM it's all preference.
Say we buy Grealish.
Scenario 1: Matic injures
...........Bruno......
Mctominay....Pogba
Scenario 2: Pogba injures
..........Bruno.......
Matic............Fred
Scenario 3: Bruno injures
........Grealish.....
Matic.......Pogba
But let's say we get a DM instead: Kalvin Philips for example.
Scenario 1: Pogba injures
........Bruno......
Matic........Fred
Scenario 2: Bruno injures
Pogba.....Fred
.......Matic.....
Scenario 3: Matic injures
........ Bruno....
Phillips...Pogba
I think whether you want and AM or DM instead, it just depends on which situation you would rather find yourself in if we lose any of Bruno Matic or Pogba to injury or rotation