I don't see what is so bad about anchoring. I use a combination of anchoring and free hand when I play, and I've never experienced any problems. As far as I can see, here is a list of the pros and cons of anchoring

-Gives you a stable point from which to pivot your wrist
-Distributes picking tension evenly between wrist and fingers
-Allows for an even pick attack on every string (not a different angle of incidence on every string)
-Allows MUCH more pick control

-You'll get yelled at by free-hand elitists on UG

What is good about freehand that anchoring doesn't offer?