ShipOfTheseus
Clint Dempsey
I don't think that Dier and Wanyama is the kind of midfield a progressive team should be playing. In fact, the whole reason the 2 in a 4-2-3-1 was developed was so that a team could play two players like Dier or Dembele and didn't need a Wanyama.
Using the choice of someone who picks Jordan Henderson for their midfield is fighting a losing battle from the start - you need to do better than that.
Dier seems to me to be scariest at the moment when he is unquestionably the sole defensive midfielder, because then his misplaced back passes go down the middle into space. At least when he's on the right, further forward, with a counterpart on the left, then Toby is usually behind him to mop up.