Micah is an outstanding pass rusher, but a mediocre run defender in my opinion. For example, PFF ranks him 72nd out of 211 edge rushers vs the run (sure PFF is not the end all be all, but in this context they are correct). A lot of heat goes to Mazi Smith, but he's not the only problem vs the run.
Even at around 245lbs, Micah is too slight to be in the same place when deployed to rush the passer or vs the run. Guards, Tackles, and even TEs are allowed to hold him or even tackle him with no penalties (facepalm).
He needs to be moved around - even back to off ball LB to protect him a bit since the officials won't.
Playing (a bit) more LB may actually protect him from 330lb Guards or Tackles getting their hands on him, and wearing him down or even hurting him (like last season).
With more reps at LB he can still rush the passer and can be used as a chess piece.
I'd like to see Kneeland and Sam Williams get more snaps at edge vs the run. They are stronger / bigger than Micah and better vs the run.
The Cowboys gotta control the trenches, with better play vs the run by their edges.