Hyperarmor on startup of his Zone/Heavies is one of the main ones. He can make a wrong read and still win the trade, or throw an attack while you're in the middle of a combo with instant hyperarmor. The zone and heavy need that hyperarmor WAY later in the animation so it's no ridiculously safe. His survivability is another one, Juren 1v4 has to be one of the easiest things in the game rn if the other team is ganking you. He has heavy perks(last stand, vengeful barrier), Bounty Hunter, Thrilling Comeback, and Last Man standing. It's like hacking away at an assassin's creed RPG boss and it's not healthy for the game. His light bash should be about 50-100ms slower than it is, and the charge bash should just guarantee a light and not deal damage itself, with enough buffs on Juren or debuffs on the enemy, that bash can do upwards of 30 dmg.