I main AD Shaco and was initially frustrated by the rework. However, after numerous games experimenting with different builds and jungle routes, I've been finding a lot of success.
Concerning the Q change, you mostly can't pull the same kind of lvl 1-3 ganks as before (though it is still possible), but once you get even just a second point into Q, his ability to jump in and surprise laners is much the same. What I'm saying here amounts to a nerf, but reducing his really early level trickery is a reasonable trade off for some of the other changes, including the extra second of duration on Q at rank 5.
E is worse now, but it is also a one point wonder, so if you're maxing Q > E, I'd recommend Q > W > E instead.
W is overall better now and I feel Shaco has gained some strong trickery in being able to place boxes while stealthed - which reveals Shaco but does not make him targetable or remove bonus damage.
The passive is now much worse and I hope they'll find another way to implement it. As a lot of people here have pointed out, his passive now limits his ability to regularly crit, which seems totally insane. I'd personally like to see the 20% damage bonus when attacking from behind return, but maybe just make it so that that damage cannot crit.
The build I've currently settled on uses normal Shaco runes: AD reds, AS quints, armor yellows, and AP blues. I go Warrior > Tiamat > Gunblade > Lichbane > Zhonyas > variable.
I'd like to point out that I am an AD Shaco main, and although this new build includes a lot of AP items, it's just weirdly the best way to preserve the AD crit shaco style from before. The moment you build Gunblade you get a proc for 250 damage; Lichbane adds another ~200. Those two items, coupled with Shaco's backstab, Q damage, and Warrior/Blade AD make for great squishy killing burst. The Zhonyas coupled with Shaco's new R proccing mini boxes allows for jumping into the enemy, blowing up a target, and often still getting out alive after Zhonyas wears off and you can re-Q out.
***Shaco's damage is still lower than before, no question. BUT, he has gained some tools, and ultimately THERE ARE NO MORE PINK WARDS!!!! And that's the greatest thing, instead of playing Shaco as an Assassin in the early and then transitioning into pure split pushing (as was often the mandatory case), you can now play as an Assassin the entire game. Or split push. You have options now.
Stay strong, fellow Shacos!
you do more damage by NOT using your passive, because you'll do 195% damage (at level 18; it's even worse before this) instead of 250%. Utterly ridiculous.
