M&D is still top tier, maybe just not clear #1. The top tier is probably bigger than just those you listed though, as parity seems to dominate among top teams. NXT and Capital Blue went to finals of Level Nine, so I think both could be considered top tier afterwards, although I don't know if you would have had them in it before. But when you look at what they did over the fall (NXT wins vs Skywalkers, Grizzlies, Ultimate CC, Capital Blue, BBL Elite; and Capital Blue wins vs M&D, Monsters, Salt City, BBL Elite, Mass Elite and only losses to Tier 1 teams), they probably go into the Tier 1 category too. So M&D's losses aren't bad loses, just loses to other Tier 1 teams. Which makes the point that Tier 1's are probably teams that beat each other, but then beat the other Tiers when they play them.