I would love to see sometime things along this line
1. Mini-vault size approximate that of a t1 connie
2. guild halls that have libraries as part of the structure in real life they would
3. trophy cases very small footprint that can be added to a personal structure that could hold up to xx number of trophys but can hold all of the existing trophys in game
4. storage chests very very small footprint it should have 1/4 the size of a tent as an example hold few items but have same bulk
5. rentable storage buildings you could pay x money per period for x storage if you cancel the agreement it falls back to your vault
6. community upgrades/planning (Ill use the example of a guild town) if owner of guild main wanted to improve guild settlement they could add roadways that could be built/sidewalks/lamposts gazebos on community property and maybe outbound portals.
7. player built customizable outbound portals(customization limited to destinations only)
Additional ideas
8. saris craft center same footprint as saris adventure center but have craft trainers instead of adv trainers in it