Halo Reach with the ranking like captain and stuff made a lot more sense. Can't see why the halo 3 ranking system I so popular? You seemed to have a different rank in a different game.
You should have a bar at the bottom like in Halo Reach but to rank up to level 2 it takes 500exp an so on, then a simple rank and not a number next to your name, like on Reach.
The Halo 2 & 3 ranking systems were too complicated, especially for new players.
Proper ranks like in real life should be used like Private, lance corporal etc.
MAKE MORE SENSE THAN HALO 3.