I personally think that each planet should have a Guardian outpost. Think a mini social area. A small area in which guardians could check the bounty board, get ammo, access the vault, and check the post master. We all know going to the tower is great but we don't always wanna go there in the middle of something just to get something out of the vault, collect a bounty, or collect a possible shard. This idea could even have its own event. Defend the outpost. 5 waves of increasingly difficult enemies that guardians have to repel. Personally I think this idea is gold. And it is my hope that bungie sees this and adds it to the game.