To me, the Trebarnii look like quiet, enslaved, crushed-spirits, creeping-through-the-jungle guys, as opposed to passionate war whooping Indians. Maybe that's just me, though.
I wonder what kind of tension would exist between the enslaved/dependant and their masters.
A mini of a shaman-like Trebarnii with butterfly-sized swarms circling an outstretched hand would look really cool. Also, perhaps a "leader" with something perched on his shoulder, telling him what to tell the other Trebarnii, both as the boss and as an angel/devil on the shoulder. Maybe a little group of Protectors of the Masters' Eggs, too. Sounds more like a scenario than a new mini sculpt, but perhaps it will ignite someone else's imagination.