It may just be me but it seems like they screwed up when they removed it. Backstabs aren't doing any additional damage as far as I can tell, throwing knives are doing less damage with supposed backstab crits than is even listed in the description.
That is to say, at 5-7 damage the backstab crits with throwing knives are doing 4 damage. Either broken or massively nerfed from EA.
You're complaining about a nerf we all knew was incoming. And you're complaining about a talent no longer being required to automatically backstab for critical damage. You're also probably still using level 1 shivs like I am on my Rogue. So... what's the issue? Game too hard now that you can't lolfacerollRogue any more?