I took the time to draft a reworked Document Properties dialog.

I already created a blueprint for that two years ago:
https://blueprints.launchpad.net/inkscape/+spec/document-properties-rework

And now I finally also described my proposal in a bit more detail including some mockups within the wiki:
http://wiki.inkscape.org/wiki/index.php/BlueprintReworkedDocumentPropertiesDialog

Would be great if someone took the time to review it and give me some feedback.

Thank you in advance,

Sebastian