I'm going to have to strongly disagree with you on wanting trusts in the over world.
It would be terribly dis-enchanting to be seeing the same NPCs over and over with other players in the zone. ><
I assume they will be dungeon only. Though I prefer to play with friends and other people so I'll likely only use Trust if there are rewards linked to it or the MSQ demands it, which is fine.

Side note: XI has teleport points now? Ha, I used to make my living being a tele-taxi WHM main.