(Don't mind my journal hopping, nothing to see here, *handwaves*)
As for Mike: dooooo iiiiit! I get a kick out of it every time Blaine and Mike interact in the background or goof around dancing together (*coughYouShouldBeDancingcough*), and now that we've got Tina and Artie, there'd be more interactions for him. Plus, I think we're down to Mike, Mercedes, and Sam for the core ND members, plus Rory and Joe, and that's a pretty good percentage of ND being played, XD