I get what you're saying, but I really don't think they're going to do much more in the way of story than they already have. (Maybe I'll be proven wrong with this Hildr's Quest update that they have planned, but I'm not holding my breath there.)

If you'd like to add your own type of stuff for that, though, there's some mods you could look into, like "Marketplace And Server NPCs Revamped." You could even combine it with "WackysDatabase" to give special items and such as quest rewards.

Additionally, some mods offer bounty hunting or world bosses, like "EpicLoot" and "JewelCrafting."