:::::Um, still, non-article pages will be either categorized under Cat:NA-importance (which should disappear with this setup) or under Cat:Unassessed Foo articles (getting mixed with "real" unassessed articles. Now, I can just remove Cat:NA-importance from the wikiproject's category tree, but it would be nice to have the template just disregard the NA importance value if the full quality scale is used... is that possible? Of course, if this is too much work/not useful for others, I can think of a way to implement it on my wikiproject's template.