Mistwell
Crusty Old Meatwad (he/him)
I was referring to people who seem to think that this power can be used on the turn of the enemy in order to lift him into the air and deny him the ability to attack. That would only work if the enemy did something in its turn before attacking or charging, because otherwise they'd get to complete their action before getting Pinioned. Its possible to stop someone from attacking with this power, but its very tricky, and works under basically the same circumstances as a power that knocks someone prone.
As for the utility of reading actions to beat an enemy like a pinata when this power releases and drops them to the ground... good luck? Anyone capable of readying an attack against a pinioned enemy so as to trigger when they return to the ground would also have been able to actually attack the same enemy had he never been pinioned in the first place.
Obviously you would use the readied action to do something to effectively waste the targets turn for yet another round. The power is all about taking someone out of the action for a while, and whacking them again with some sort of temporarily disabling attack once they land is the most likely follow-up to it.