They wanted to increase their time on target. Which I agree it is odd the way they are doing it, they require you to push the target out of range in order to get more time on it.
However, in hutt ball, I can see juggs leaping to a target on a bridge, pushing him back across a fire pit, then leaping to that same target on the reset of charge. This seems to be more of a hutt ball carrying buff than what they intended.