The Sun Sword/Headscratchers

Did anyone else notice all the hanging plot threads? What is Isladar's plan and why do we never find out? For that matter, what happened to the coming House War in Terafin? The last we see of them is Jewel showing up safely back at Terafin, but that comes nowhere close to resolving what happens next since it's implied they're about to have a rather nasty war.