The platform was actually good for planting. Having the thumb sticking up and on the top of the grip instead of tucked in to the fingers of your fist resulted in the thumb sticking in to the snow and getting bent backwards when touching down/falling down and reaching out. Any good martial arts or boxing instructor will tell you to keep your thumb out of the way flush against the fingers mid between knuckles to prevent thumb injuries.Did you still do tip rolls with them?
Some people found those injury producing.
People I know that used them for ballet cut the top half loop off. You cup the top of the pole in your palm (facing down) for tip rolls, pole flips, and launching for spins/axles, etc..