One thing I'd love to see in addition to trusts that I really hope they one day implement is being able to do a trust party with friends. Like if me and one other person want to do a dungeon together we could have the option to fill in the other two slots with trust members. Or if there's three of us, just take one trust member.

Mostly I want to do this because some of the earlier content is very easy and some of my friends have lamented how much parties tend to blaze through it and wanted to experience the game in a more appropriate manner. Trusts go a long way to fixing this, but being able to do a mix of playing with a couple friends and trust filling in while doing things at min ilvl would be neat.