I think Buckley wants the player who receives the ball to immediately dispose of it. If that player is tackled , regardless of having no prior opportunity, he must dispose of the ball . As it is now, the player can just hang on to the ball. I think his theory is that if it is policed then it will discourage the handball to a stationary player during clearances, thus opening up the play more and having less stoppages. I don't really know how that would look but it would certainly change the game a bit
The problem is that some players will paddle the ball forward instead of picking it up. And tackling will be as high priority as winning the ground ball.
You want 50-50 contests not one where a player either tackles or paddles it on because that's the best chance of maintaining possession.
There would be more flow ons from Buckley's theory. But then again maybe they should try it for a pre-season game or something