Yeah. They are. High powered offense in the regular season, defense that is good but not elite. Mahomes is better than Smith ever was, but now they lack a running game(inevitable under Andy Reid anyways). As good as Mahomes is... That lack of a defense is going to bite them in the ass.
Outside of that front 7 their secondary is pathetic. Eric Berry is great but he's one man. They'll probably lose in the postseason again. If not in the AFC, I don't see them beating the Saints or Rams(again).
They'll kick our asses... I expect us to get slaughtered. But the AFC isn't as bad as it was in years past. I could see the Patriots, Texans, or Chargers giving them significant problems in the postseason, even at Arrowhead.