There probably is more to Terra then. We haven't seen some of the other leaders for awhile either who have important use to the plot in ways.
All these potential meteor allies does raise that question again of an internal rebellion of sorts within meteor. However, maybe not as well since Sirius will have none of that.
I assumed originally that each of the eeveelutions were owned or governed by a certain personality, in a way, that eeveelution represented them.
Of course that's not really much of a thing now and we can probably expect a full tteam of eevees next time we see them.
Hm, what if eevee is like, the favorite pokemon of the younger sister? Dunno.