Shaco will never get reworked, buffed or nerfed.
The feeling i get is that riot has not touched this champion for a long time, never will and are afraid to do so. Shaco's kit is very unique as we all know. Speaking on behalf of most the shaco mains, we are all afraid of a rework. It might totally ruin this champ. Back in 2013, they planned to do so but did not reach a conclusion. If he did get buffed, he would probably get nerfed after because he is a hard champion to balance. One thing i am pleased of is the back stab indicator riot is planning on adding in patch 6.12. This is the type of "buffs" they should do to champions like shaco. It does not improve shaco's stats but can improve his gameplay. one thing i would like to know is if they are planning on touching him in the assassin update.
Went up against this build recently...and she was hard as hell to counter, as well as defeat.