I guess its all about trying to find a tall mid such as a Cripps , Bontempelli or Green
Who can go get the ball stand up cant be tackled as they brush off a mid in the 180s and takes marks around the ground
They are super hard to find though, as others say, for every one of them, there are dozens of others that don't make it.
There certainly is some sort of love affair throughout the industry at the moment around the "big bodied mid", but unless you find one that is great at finding the ball, but more importantly has exceptional endurance, IMO they will either move to one of the flanks (HF or HB) or they will fail. We've seen that ourselves, when Vlastuin was recruited, so many wanted him to move to the midfield, but he wasn't anywhere near as good there, then we have the RCD's etc.