Hi Michael, I think that's a nice way to do quick scaling and/or rotating, but as for me I rarely need to scale or rotate an object in such a "random" way. The strongpoint of MoI (and Rhino) scaling/rotating system is that you can specify the pivot point from where the command applies. It's a question of choice, I guess. I've never loved gizmos very much!
Keep up the good work, though...!
Ciao
Dan