I wouldn’t mind that rule. Or ban them altogether. Just curious though, what if the player intentionally pushes out to a jump and the incoming player gives it back to them.I would prefer the rule to be that you can only use the jump cue to attempt to defeat a safety or jelly roll by your opponent. In other words, you should have to finish your inning with the cue you brought to the table when your inning began. A player shouldn't be allowed to bail themselves out of a bad positional shot with a jump cue, IMO. That rule would still keep a jump cue involved in the game of pool.
Since they created the jump situation it gets interesting.