This has been mentioned several times, but I really feel that Infinite is missing a rewarding system that gives players something to strive towards and show off achievements. A very in- depth rewarding Commendation system will bring an element that is currently missing from Infinite and all 343 needs to do is build of the past Commendation systems.
What I would like to see for a Commendation system is a XP/rank system with an enormous amount of tiered Commendations to chase. Each level that is achieved can reward rank emblems that can be customized and equipped to your Spartan to show off your rank along with some nameplates and skins. Completing a Commendation to the mid and final tier should reward very rare and unique armor that can only be obtained for completing the Commendation associated with that reward. The amount of potential Commendations is limitless and allow players a supplemental way to earn unique unlocks and a way to show off their Commendation rank and achievements, by equipping rank rewards.
The system can also have the same system as the MCC, so that the rank can be reset and you can continue to chase higher tier Commendations as the requirements and rewards increase with each rank up.
343 really should reconsider adding in a very in-depth and complete Commendation system because Infinite needs more for players to strive towards other than a Battlepass.