I kind of agree with you, the Vord story arc seems complete (though the Vord queen did say that they had ravaged worlds - the plural stood out for me).
I think the transformation of Aleran society from a stagnant Aristocracy based on Fury crafting ability to some form of meritocracy, and all the upheaval, power struggles etc over the next 200 years or so would be interesting, especially as those with fury crafting could (in time) become ostracised.
With the Alerans being less advanced in boat buidling and seamanship than the Canim and the Canim being fairly insular there could be other parts of the world to exploit.
Just seems the Alerans know very little of their own history and even less of the cultures of the world they share.
Anyway, guess I just really liked the universe and would read more of it if any more was written.