Remove it. Remove all leveling. Use a store for cosmetics and that’s it.
Halo is meant to be played for fun. To kill, to capture flags, to do crazy stuff.
Too many people are too worried about leveling they aren’t even playing for fun. If you want to collect stuff go play animal crossing.
Me, I’m here for the Halo fun. Just like when games were played for fun and not for progression. No one cares that Mario doesn’t have progression and they shouldn’t care if Halo does either.