What about a new gambit mode? Something that feels like a moba, and could be a competitive mode in Destiny. I was thinking of something very similar to the giants of this genre, LOL and DOTA. A map with three lanes, towers, jungle and minions (taken as minions?). I think this could work even in a fps. Every level you unlock nades and melee, on level 6 you unlock your super. In jungle there could be bosses to kill to take buffs. I'm making a poll leave a feedback if you think this could work, and maybe Bungie will see this.
EDIT: Maybe purchasable weapons and gear in game?
No.
This game's relationship with PVP is complicated and needs to be sorted out. Not doubled-down on.
I'm sorry but Gambit just doesn't generate enough player interest to warrant multiple game modes.