First and foremost, armor abilities should be treated as pickups, like the pickups from previous games. People loved that. Just imagine what Halo 3 would've been like if you had the option to spawn with a power drain, bubble shield, or a regenerator. That would've been a pain in the ass to play.
Zero bloom should be a permanent change, because everyone (for the most part) in the halo community throughout CE to H3 loves consistency.(and yes Twinreaper, I know it's not actually "bloom" but everyone here knows what I mean when I say it)
Armor lock and camo armor abilities basically ruined the idea of power-ups from previous Halo games. If these don't get removed, then power-ups being added into MM are pointless, although I would love to see it happen.