I'd second (or third) this request, certainly for book covers and tri-fold leaflets etc. Currently setting up a book cover/jacket or tri-fold leaflet artwork as a single page means
a) no crop marks on the exported PDF indicating the spine width or fold marks for a tri-fold and
b) a lot of manual adjustment of the page elements should there be a need to change the spine width
Would be 'nice' to have the functionality of ID in this respect with the ability to have unlimited pages in a spread but certainly three pages for book covers with the ability to adjust the width of the centre page independently of the front and back cover to accommodate changes in spine width which then includes the addition of crop/fold marks for the spine in addition to the crop marks for the front and back covers.
I suspect this is going to be a heavily requested feature...
There are times when a 3 page spread would be useful (as in I currently use on a regular basis in InDesign): book cover designs, tri-fold pamphlet design etc. Is this something that will work with the official release?
I think the section manager should be changed. I see sections as more of an organizational tool you'd use as you are planning the publication, so you'd make the conceptual sections and then assign pages to a section, but now it is tacked on top of the existing pages For example you cannot add more sections before you add more pages.