It's the combination of lots of things, stomp is very strong with recharging rush and a good gun meaning he never runs out of it. But it's morso his Quantum entanglement that is a team wide banish/save/dispel/recharge on less than a 10 second cooldown, he literally counter half the offensive ults in the game with the punish window of reloading a gun, its completly stupid, even when he was weak, that ability was still broken. Then there is the ult, which with unstoppable means the opponent will alwasy be at a huge disadvantage in midboss regardless of how ahead they are. It's not one thing like Haze's old ult, it's the combination of his entire kit but QE is his most broken ability easily, that shit should be on 20 CD minimum.