There's an ocean wide difference between "main eventer that's been built up as unstoppable for two years" Braun Strowman and "two guys that just showed up a couple months ago and have done nothing" AOP. AOP aren't doing anything atm and have done nothing yet to suggest that they're monsters or that they deserve that sort of special distinction from the rest of the midcard brawl pull apart pack. They're not even taller or much bigger than Roman or Lashley. Maybe if they get a Road Warriors level push, but I don't see that happening any time soon if ever.
If we're complaining about guys that shouldn't be in the pull apart crowd, former universal champions like Finn Balor need to stay in the back.