A feature that flew in under the radar and one I am eternally grateful for is now you can start the first page numbering at a specific page.

Previously automatic page numbers started on the first page of the document or book.

So even if I went to page 11, let's say, the first page of the story for a book, and used Insert > Page Number > Start Numbering on Page 11, it automatically started on the first page.

So aside from Master Pages which would make me a happier camper, it would be terrific if text areas for left and right hand pages could be configured separately. Right now Designer Pro X treats the text areas on left and right pages the same. Fine if the text is centered on the page. But if not one page in each spread has to be re-positioned manually.