It would be productive to have a global fonts setting instead of having to do filter the ones we don't want changed. This could work across all views or set specifically per view in the Document|Set Model View|Model View Options. Also it could be set for individually for labels, text, dimensions, headings, tables, and custom objects.
Not sure if this is the same thing - but the ability to define styles would be great. When you have clients who use different fonts it would make upgrading a file too easy.
Also great for offices where you don't want people getting creative with the company style guide.