This is a very cool article which has left me wanting more. It seems to stop just short of the end though, there is no section to actually explain the component values in a rotor, or an interactive diagram deconstructing the component parts of a rotor. Or did I miss it?

I'd also be really interested to see some more applications. I wonder what rotor interpolation looks like for example? I know I've had problems with quaternion interpolation in the past.