One thing I hate about the BP system (aside from how long it takes to level up) in this game is how boring and unrewarding it is when unlocking armor. So I Thought up another method for unlocking armor that would be far more engaging to players and that 343 can still monitize at the same time.
So instead of buying a battle pass and unlocking armor everytime you level up, you can buy (what im just gonna call) a store pass, This store pass will unlock the ability for you to unlock the paid cosmetic (and some free comsmetics as well) in the so called store. So instead of unlocking XP per match or by challanges to level up the BP you’d instead woud obtain CR much like in halo reach. You can then use these credits to unlock armor within the store that you have earned enough credits to retain. This system would allow players to save up for the credits for the armor and comsmetic items they want making it more engaging and rewarding for the player. How much each item will cost will depend on the rarity of the item so say the flaming armor affect will be ledgendary and will cost more CR then the items that are rare or epic. 343 can monitize this as well by replacing the xp boost with credit boost and challanges can give credits as well so Challange swaps would be unchanged. For those that dont buy the pass they can still get credits but can only unlock the free item in the shop pass. And for those that want some sort of progression system and other ways to unlock cosmetics, there can be a season rank for each season. You would unlock armor or cosmtetics for getting to certian ranks but these ranks should work much like how halo 3 progression system works so those that do really good can unlock more rare costmetics for their skills making the game feel more rewarding and making players try and win matches so they can unlock some of these costmetic items.
This is just my take on a new system if you guys have more ideas to add to this then feel free to do so. Maybe one day we can get 343 to implmet a system like this instead of the broing grindy battle pass.