I wouldn't swap Herrera for Kante, not this season. You probably see less than 10% of what he does and the whole world is blowing smoke up Kante's arse, so I can see your logic. He's nowhere near the best DM this league has seen in my opinion, he's probably up there with the best tacklers, but the likes of Essien, Makelele or Alonso wipe the floor with Kante, I'd include Roy Keane and Pat Vieira too if you want to count box to box CM's.