Buka, Superfoot's close-in kicking ability is awesome, but remember how flexible he was able to train himself to be as well. I completely agree with the training methodology you put out there, and would recommend youtubing (verb form) Bill Wallace's PKA fights so you can see what the finished product can look like.
My only issue with it is that it's a sport-based solution. I'll go with a (probably soon to be attacked, and rightly so) general globalization: It is usually not a good idea to be standing on one foot in a fight.
But, man... it feels Good to land a spin-heel to the head on someone as they are charging in... as long as the power is enough to toss them, rather than you!