Any adc can deal over 3k damage in 1.5 seconds...
But Shaco can't even get proper crit support from his passive. Keep in mind, Shaco's backstab is incredibly difficult to land, is melee, and almost always requires him to use his Q to get to it. Oh wow, his Q also does 0 damage and you have to max it first just to gank successfully. Because one shotting from stealth is toxic,
. Oh, and any adc that sits in a bush with their range. Because its much nicer to have that than an assassin that is terrible at doing what assassins do. If shaco's Q is his engage, what is his disengage? R??? too bad, you die anyway because once he goes in, he's there until he dies. Might as well just make Shaco a tank because that's how it feels playing him at this point.
As of his current kit, he has pre-sion syndrome. His kit doesn't know what he wants. AP or AD??? Riot doesn't know either.