Hey there Telcontar (Tel for short?) awesome name btw is there some meaning to it?
First off your command of English is awesome.
Second, your theory about the Shattered Plains, nice idea. My personal (just thought up this minute) theory is that Urithiru was sited there, and was either destroyed by the shattering of the plains, or is located under it, leading to the Parshendi either living in the submerged city or just scavanging the leftovers. Also Taravangian may just want to consolidate some serious power on the plains to trigger some event of some form (Szeth, Kaladin, Dalinar, Shallan and Jasnah, and even Ekholar (sp?) are powerhouses...).
Welcome, and watch out for the staff, they like to spike people XD
I hope you enjoy yourself here, its a great place.
Joe