Isolation Platforms under Line / Power Conditioners ..any thoughts ?

I haven't heard any component, power conditioner/regenerator or otherwise whose performance is unaffected by resonance/vibration control.  In my experience, any time you can mitigate resonance/vibration you realize an improvement in sound.  I have Black Diamond Racing puck/cones under my PS Audio Premier regenerator.

Agree with geoffkait that you don't have to use a fancy (read expensive) audio tweak.  There are materials available at Lowes/Home Depot that can yield a desirable effect.

IMHO  ALWAYS do what you can to reduce resonance/vibration in your components.  This includes modifications to the interior of a component as well the exterior.  

Many audiophiles decry allowing speaker cables to touch the floor.  Why would anyone just plop a component of their system on the floor?

One thing that my many years in this hobby have taught me is that vibration and resonance is the enemy of good sound.  Period.