User blog comment:LivesByProxy/Shaco - Champion Update - Season 6/@comment-24385282-20160122230809/@comment-26815373-20160203182230

I intend for the Killing Joke to be the most stylish and flavorful execute in the game. The way it is worded means that any attack Shaco makes that drops an enemy champion's health below that threshold, triggers the stun. Imagine you're AD Shaco, you're built, and you jump a squishy Ashe. If you backstab her once, E, and backstab her again, you've effectively taken 85% of her health, right? If so, barring rescue from her allies, that Ashe is dead. But at least she died with a smile and a laugh. ;)

In my experience with Shaco, he has a relatively low burst, and while you can 100-0 someone, the vast majority of your kills come from snagging targets of opportunity with your E. This passive gives Shaco some much needed utility and power. Now, he can arrange for his allies to get the kill. The stun also gives him a chance to get more backstabs off, so it works with his Q, W, and R, which can all be used to trick your opponent and get backstabs. Also, because it works off of the enemies maximum health, Shaco can now tickle tanks into submission if you're trying to peel for an ally or save a teammate.

About JitB, I think your latter suggestion would be good, and it makes lane Shaco have to manage boxes and minions, which is what he currently does to some degree, but I'd be less frustrating I hope.

About Sleight of Hand, I'm not even sold on this iteration of it. TSP is his least iconic ability, yet it is maxed first and, like I stated earlier, is what guarantees most of your kills as Shaco. What can be done with this ability to enhance Shaco's flavor or gameplay? I'm not sure. You do make some good points though about the power level of my iteration, which was intentional. I didn't want people accusing me of needless Shaco buffs.

Glad you like the changes to Hallucinate and Deceive (which is a photoshopped version of Riki's Smoke Screen from DotA2). And he does deserve the smokey-clone-flash-back effect. Riot, please!