Dragon Slayer Buff = Shaco Nerf
A Recent patch added in "Shaco's Hallucination will now display fake versions of Blue, Red, and Baron buffs" The Dragon Slayer buff awards you with some stat boosts and a visual effect around your character given after slaying dragon. This visual effect however is a problem for Shaco as it gives a constant, easily recognisable differentiation of Shaco and his clone, this removes any of the mind games that were once possible through his ultimate. I understand that this was done purposely as they stated it would only show blue red and baron but I find this a little unfair as it is far too easy to recognize the clone with dragon buffs 3-5 and only punishes you for doing well and taking objectives