I was thinking it would be really cool if instead of a vault we could have a player base with the main purpose of having an armour/weapon display room. This would give a lot more value to armour and weapons you collect but don't necessarily use. If you could have a different base depending on which planet you wish to locate, that would be cool. You could let other players enter your base if they are on you fireteam maybe even borrow weapons/armour whilst on the fireteam.