So, I've thought a lot about Yrth as a campaign setting in the past, not the least of which was an entire thread started 11 years ago on the subject:
http://forums.sjgames.com/showthread.php?t=54684
Although I've since had different, new ideas, like moving Sahud off of Ytarria and making it part of a separate, but nearby Eastern continent that also includes other Asian nations, including an Indian empire. And another Continent further south, serving as Africa to Ytarria.
Another idea I had was creating more ancient ruins, dating back to the dawn of Elven civilization, and perhaps older still, with the suggestion that the Elves are the last remnant of a far older Magi-Tech civilization, who may or may not have been human spellcasters (in a nod to the old Pyramid Magazine
Elves: a study in Transhumanism.)