Talon's E (cutthroat) is a 3% damage amplification until level 15, and 0.25 second slow/root...
This ability is garbage. The silence was literally the only thing good about this ability and you still leveled it last. I would sacrifice this ability for something relevant. It really only exacerbates his feast or famine problem since by the time the E (cutthroat) is maxed you have already reached late game at which point you probably didn't fall behind and be useless the entire game. You also probably do plenty of damage at this point to the relevant targets that the 15% is overkill anyway. Talon is Riot's red headed stepchild whom they take out all their frustration on. Call him a stress ball if you will.