This, in itself, is a great card for rogue. The problem is that rogue doesn't really have the health gain to make the best use out of it. Hard to evaluate, but I can imagine it being played as a one-of perhaps.
It's more or less aShadow Strike with 2 uses, but you pay say 7-8 health for it on average. Is that acceptable? For the most part I would probably say yes.
Not that convinced. First we'll need to know if it works with Blade Fury, and I'm not so fond of the idea to play it for this card, especially cuz there is so many weapon removal lately. Also either you use you weapon on small minion and this is a waste, either you use it on big ones and your life will lower to 0 in a glimpse. We have seen any potent healing source lately. This is terrible against aggro, and I'm not so convinced against control.