These are the first set of Legendaries ever designed for a specific class. Not only that, but they are the first legendary with a proactive proc, and where the stages before the final form also have a proc. Blizzard has broken the mold with these Legendaries and they massively open up the possibilities for what could be in store for future expansions. They're exciting not just for Rogues, but for anyone to think about what could be in store for them in the future.
"They wanted to hold me, to keep watch over me – a prisoner in all but name. But I will NOT be held accountable for the sins of my father. My destiny will be my own"