Ummmm, the list you have seems pretty comprehensive to me. A bit more clarification on what happened with Haruka and why/how he and Doumeki separated but Doumeki isn't sure if he's alive or dead. Also since he talked to Kurogane ahead of time, clarify if that is Haruka knowing things or if its just 'i'm getting old and won't be around forever'.

Tomoyo being preserved at her age could use a bit more explanation, or at least be alluded to earlier. Rumors about the leader of the complexes being immortal that deadlands people alternately believe or scoff at (but without giving away who that leader is)

Also a little bit more about why she let the go at the end would be good. Was it that she prefers to manipulate people to willing follow her will and forcing them to stay against their will interferes with how she sees herself (as the benevolent ruler with only her people's best interests at heart)? The shock of Kurogane completely rejecting her, when she had convinced herself that he would come back to her eventually? A combination of both? (that is the impression I got as to her reasons) Or was their something else to it as well?

I like the idea of traders showing up. Humm maybe you could use Magic Knight Rayearth characters (i don't believe you've used any of them yet). I could see Hikaru and Eagle exchanging gossip while Lantis looms in the background.

I hope this helps!