The Imperium in a 40k MMO? Whoda thunk it? I didn't think anyone would want to play as a Space Marine... Everyone should respond to that video with clips of "duh.." over and over.
That's not a bad idea. But I get the feeling that Marines will be just plain 'better', but can't be unlocked until a certain level is reached or similar prerequisite, just to milk the game for play time.i think a good way to ballance IG and SM would be to start as a comasar i think there called? (idk, dont play any IG players) and you would be able to "summon" "minions" so that you could level the playing field just through sheer numbers, which would be very similar to tabletop.
taking the same idea one step farther, i bet cultists could be given a similar system, performing rituals to summon daemons. that would allow for both imperial and chaos SM to act more like tanks: firing a bolter as they walk towards their enemy, just to skewer em with a lightning claw
just my opinion though.