We'd all like more of them. But until we have time and talent for new backstory and mish design for these dozens of NPCs, I have a suggestion:
Let us re-run the missions. Not a single one of these mssions gives any major, game-altering item. But many are fun. So why not let us run them again? By "run them again", I mean after completing the current suite of five, let it reset so we can start over.
We do the same thing with crits, except with the added donkey-work for the devs of making sure they don't affect our organizational standing, and of needing to design some new cute but non-unbalancing item for a reward.
What's not to like?
By the way, I'd like to be able to get rid ofn this whole singleton thing, and be able to hold multiple copies of any item. But that's for another post!