Full keyboard support
Your current keyboard shortcuts are OK but for full productivity we need full keyboard support and let go of mouse. (i.e for every thing and in a intuitive way). You can get inspired by what Checkvist guys have done.
Every body please collect your votes under this general topic so it become real sooner.
It's sad this hasn't been done already. How hard is it to at least give users the option to have navigation key combinations. I'll have to check out this Checkvist.