So, I have had a marvelous idea that 343i should make a flood survival mode. They could have limited resources and have only a few maps then add DLC. Or they could have a forge specifically for the flood invasion mode. Add what you think at the bottom with a comment so 343i will do it.
I think it's too early too be thinking about armor effects when we don't know anything about characters, weapons, menus, graphics, vehicles, story plot, etc.