Sorry, don't have time to read the entire thread, has any thoughts been put into the fact that if you cut Roshar in half vertically and rotate one of the halves 180 degrees that they appear to be very similar in shape and the geographical locations of islands, hills and lakes?
They seem almost identical especially if you consider that (iirc) the highstorms drop more crem when they first make landfall and that the discrepancies may be due to additional crem deposits on the eastern half and erosion on the western?