Just a few features that I think would really help this template out
1. Create a way in the admin section to adjust the font sizes. Several fonts are great, but are so small that they are hard to read for older people. Only a manual CSS over-ride will fix this. That messes with any future font changes since the font sizes are not uniform.
2. Add more Google fonts. They are way better then generic browser fonts IMHO
3. Add previews to the Google fonts, or at least a link to a screenshot of the fonts included. It would be nice to see what the font looks like without having to navigate back and forth between the admin panel and the area that is being changed.
4. Add more CSS style rules that further separate the various areas of text/links via the admin panel & allow for more customization.
5. Add info type pop-ups to each admin changeable style to show an image of the exact areas that will be changed with the selected values. The descriptions given can be rather vague for someone unfamiliar with the theme. (e.g. me)
I love this theme & I hope it continues to be improved. =)