Now that was an idea I've not seen yet, and one that proved to be really fun. Really ran with the theme! And as a proof of concept, as you put it, I'm sold. I would love to see this more fleshed out, some AI changes as you know, different levels. Hell, even online multiplayer and leagues! Though perhaps I'm getting ahead of myself there.
Only part which I never quite felt comfortable with (and this may just be me) were the controls - somehow WASD felt confusing with the isometric perspective.