Definitely, it's just a step away from keyboard combos and chords (nothing against emacs, but despite the fact that it could simulate an RTS it would not be a good interface to one). One step Chris suggested was removing the graphical "pause all" button in the bottom left and replacing it with a button that opens the context menu. I'd also like to have a single keystroke that pops it open at the current mouse location (though there might be a better place).
And then there's the actual interaction and behavior of the window, which is very barebones at this point. One thing I'd really like is a few keyboard keys for navigating through or activating options, and some of the advanced command menus would work well in series-input-mode (click to start radius line, click to end radius line, click to start arc-width line, click to end arc-width line, etc etc, click to execute). And some of the stuff I put in there is just crazy-advanced and might be better stuffed away in an advanced submenu unless the poor player checks the "I'm asking for it" checkbox in settings
Some folks have suggested a radial layout but that seems like it would just get in the way even more (the existing one frequently gets in my way as-is), not to mention be a royal pain code-wise compared to a simple vertical layout (which it would have to default to at some point if you had too many options to fit well in a radial, etc).
Anyway I'm certainly open to suggestions