They can never ever buff Slice and Dice to match RTB. Even if slice came "CLOSE" to RTB, no one would use RTB. Ever.
Their only option is to buff it a tiny bit, but it can never be a real contender for the reasons above.
The devs need to just buff Outlaw DMG, if our damage doesnt suck then people would play it even tho RTB is the most fraustrating spell in wow atm. Right now there is no point playing outlaw when Assass does MORE dmg and you dont have to roll Grand Melee 6 times in a row.