Plain and simple. Riot has not responded to the countless threads made about the shaco rework and the disappointment from shaco mains. Meanwhile other complaints such as akali, twitch, vayne, and other champions after the patch were addressed either through a rioter comment or by this current patch or the PBE. Yet when it comes to shaco, all we get is silence. @Meddler
I also like how there's a legitate gamebreaking bug where Tahm Kench cannot eat Shaco after something happens in the game.
I also don't understand why you let junglers like Vi and Lee Sin who argueably don't fall off until very late game do 10x the damage as early game Shaco. While Shaco just sits around doing nothing.
There are people that spam for years about 
and Riot still ignores them, while they buff/nerf other more viable champions...
They don't care that much about not popular champions - Yorick and Urgot were forgotten for years...
Because it was designed to be a huge nerf and its working as intended.
Shaco has been a cheesy counterjungler for a while. Champions that rely on chaos are hard to get a grasp on, balancewise.
because no other champion is as unique as him, none of them have a free flash that makes them invisible or a stupid box that fears you for a second
I think it's because Shaco is performing well currently win rate wise so they are addressing the bigger issues first. It's like complaining about getting a minor ad-virus in your computer and complaining that tech support is going to fix the computer that is having a meltdown first.
you guys just dont have any creativity :P idk if you realized it or not but boxes can block skillshots, they can be used as wards, they can make your opponent leave lane, you can fear your opponent into a tower or away from allies, it can be used to secure drake and baron, you can use it to steal red and blue, it can be used to push a wave back for breathing room, you can stand inside of a ring of boxes and dance while the enemy dives you and dies, rylias makes it hard for your opponent to react to the fear, it blocks turret shots, you can teleport to it, and that's not even considering the combinations that other champions on your team can do with it with their own abilities.
the clone can do anything you can do without getting you killed and if destroyed damage your opponent. it also counts as another champion so you can temporarily get buffs on your clone from things like relic shield that require an allied champion. i havent tested it, but 
seems like it could be interesting to use if it works. i dont know how many passives actually work on the clone, but thormail would be interesting and warmogs as well once you have the 3k hp, but like i said i dont experiment a lot with the clone.
point is there are hundreds of things to do with just those two abilities.
Shaco seems ok rn, I lost to him pretty much every game tho so I might be biased.
Let's nerf shaco into the dirt and buff people like fizz. Oh let's make shaco's Q terrible, and make twitches Q even better. Let's take away the crit after Q. Let's ruin the back stab on top of crits. And hey, maybe give Rengar a game breaking passive? Not only sad that shaco is nerfed so hard , but to have all these champs getting buffed ....
rip sir.cheese
I think the worst shaco issues are thurnderlords not procing, and the clone becoming uncontrollable at random...mostly the clone. If you cant control the clone you cant Shaco.
Beside that im having fun with the rework...i dont like it, the ult thingy is practically useless...those bitch boxes it drops are just neat looking, but they never do anything since they are 1 hitter quitters, and one auto on one box deletes them all.
i have 5 completely different tested viable builds and am enjoying everything but the ult and bugs. [slayer-pantheon-popcorn]
Riot desired to nerf Shaco's early game and make up for it with new tricks. These new tricks being the scaling hp with boxes, AD and AP working with Q, the Q lasting for 4.5 seconds at max rank, the crit on backstab that has 200% modifier for monsters (although the Thunderlord's proc glitch is a thing with this new backstab and if you go AD Shaco after a certain point, backstabbing does less dmg than just a regular crit), and the 3 boxes after the clone dies (I don't really find this change to be very helpful and it seems like it would only work in the middle of a teamfight).
Although I wouldn't consider this a real reason to not address Shaco's current lackluster state, it was said that they would like to save big changes for Shaco for when they get around to his full VGU. Now, they have said that he will be getting a VGU in the future, but we do not know how far into the future this VGU will be and also if it would be coming before or after Akali's VGU. All we can hope for is that they officially announce that they are working on Shaco's update after Warwick's or Galio's VGU.
Maybe because he is fine. He's rocking a 51% winate with a 7% play rate.
What is wrong with that?
Probably because the new Shaco isn't as bad/unbalanced as the other champs you mentioned. Shaco seems to be in a good spot, as a hybrid assassin.
Expect the thundelord bug shaco winrate seems pretty fine , the play rate is also higher.
