That is awesome! Looking at Vixen 3, it seems to have tons of potential for what I'm looking for in my light show: having slick Nutcracker effects built in and being able to do tons of effects/transitions with razor-sharp music timing is making me salivate!
Is it possible to overlay/mix RGB colour channels, though? In your video, it's mostly, Red, Green, Blue, and White... how about mixing Red and Green which makes Yellow, or mixing Red and Blue which make Magenta, etc.?