Credits and EXP

Why cant we have both in Halo 4? The credits could be used to purchase armory upgrades (assuming that there will be an armory), and the exp will be used to level up your rank. Also there could be a relation between the two systems. For example, for every 100 exp points you gain, youre awarded 1000 bonus credits, or something like that. What do you guys think?

I agree. CR used for asthetics is perfectly fine, its the fact that they tied how much Cr you earn with a visible rank that makes no sense.