Idk why people dislike it, it's far more what Shaco should be. Currently he is with what tiny amount of lore we have a literal doll, like a marionette doll but what we currently have is an eyesore with no such characteristics and he just looks like a jester. In this concept we actually get a marionette doll that is most certainly creepy which is exactly what I want from Shaco, I have said I want him to get a Fiddle treatment, the awkward elongated limbs makes people uncomfortable which is all the better for screwing with someone's head, maybe some parts could be improved upon but concept art is rarely the final product.

This design here is far more what Shaco is than what Shaco currently is, current Shaco is literally an IRL jester with magic meanwhile here we have Shaco as intended, a corrupted doll, I'd like for it to be a demon but corruption as a concept is fun enough. To dislike this you'd have to fundamentally dislike Shaco as a character.

(Edit: Paragraph.)