About the suggested improvements:
Sub Projects – I have had a few people suggest this but I finding a way to do it and keep my interface simple is not easy.
Filtering Across Projects – If you select “View All Projects” from the projects menu or type ‘projects’ into the keyword command box you will get a complete list of all projects and tasks. This list can then be filtered like any other list.
Complete Function – I agree with this. I could add something that would allow you to view completed items (with a line through the task or grayed out) along with the other tasks. This could be optional for those that do not want to see it.

Thanks again for the write-up.

Best Regards,
Scott