I definitely enjoyed this story, much more then most I see and I am sort of unhappy that you won't continue with the series . You did say that every beginning needs an end but I don't see why one would need not create another story using the same mythos? I for one would like to see what Kaylenna will do after Old Xero's final stand.
Old Xero did say it was only the beginning.. the end of his story and the start of Kaylennas.