It's like warbanner on auto attack. Just remove it.
An example of how dumb mount stomp is: duo roaming with a friend, we get a downed and my friend goes down, I'm going to stealth him so that I can res hi---- AAAAAAAAAND PLAYER 4 ENTERS THE ARENA AND MOUNT STOMPS HIM OHHHHHHHHHHH! SICK PLAY!!!!!!
Yeah... remove the stomp from mount. Just make it do damage and dismount.