In halo 3 the AC was a lot more powerful than it is in halo reach. In reach the invisibility will go away if you start running. Which made you easily findable if you had to pursue someone or move to get a shot. I kind of ruined the idea of active camo.
I hope that in Halo 4 the AC will be like it was in halo 3 and not just a copy of the armor ability.
That is a great concept and EndWar is a good game. But that is not how halo works. It has never been in anyway like that. Like Biggles said " halo isn't built for you to control the marines, its built to control the chief."