wow you really thought about it, i liked how fable played with the combat and the your actions affecting the game (wish there were more thoe) i think the game should have 2 different forces against each other like in WOW with humanity having spartens, guys who specialize in major combat with them having more health and a little more damage but move slower and get poned 1v1 . ODST's who are more sneaky and better at 1v1 and other solo missions, them having less health but way more damage and moves fast, a marine who is basically good at everything but dosnt own at a certain aspect. Im sure you can think of things for covenant and i think it would be really fun if you could chose a side and fight one another. i know it sounds like wow but make it play like fable or mass afect i dont wana play a game on the comp like that.