Personally i liked the Halo 3 ranking system, but I see that Halo 2's is the better choice. It will probably be a good idea to maybe get the best of both and Halo Reach's cR. But the cR doesn't rank you up, it represents EXP and allows to buy armor like in reach, but (a little off topic) people shouldn't be allowed to buy the armor because they have enough credits. It should be shown as prestigious, and the ranking system in reach was a joke so the Armour didn't mean anything. But for example I think it should be like, (Example) for Hayabusa you need these 3 achievements, this specific rank in a specific playlist (I liked the ranking up in individual playlist) like snipers, and this amount of cR. So the if your wearing Hayabusa and all, people will be aware of your special skills, which will be sniping. My own opinion.