At the end of the Age of Legends everything didn't cease to exist and revert to some remembered ideal. The new age, as I've inferred from too many conversations throughout all the books, began with pain, suffering and rebuilding. I assume that the next turning of the wheel will be similar. The philosophy is that there is room within the patern for changes as long as the overall design has the same result. So the rest is just detail. but I doubt that anything will be "like it was".
Another interesting question, though, is that if the world did "revert" what would be the ideal point to go ba