I like the way that Corel Draw has implemented the OTF glyph management I would absolutely love to see Xara do something along these lines. The interactive method would be very useful, but like you I'd like to see both methods in Xara.

Otherr DTP features I'd love to see are a booklet creation feature that would give you the ability to automatically layout your pages in folios (printing order) with cover pages, and more attention paid to the columns feature, adding the ability to set column width, gap width and number of columns individually, and settings for how the columns flow for example if you are layout a booklet in folios a article that starts on page 3 and flows to page 4 might have to jump from one folio set to another and from a right hand page to a left hand page. and table of contents features would also be a good DTP feature.