Baseline Preparation is going to be a nice change, but the only CD that it resets that is really going to be worth it is Vanish. Evasion is just a bad cooldown with the nerfs to base dodge, it used to be with Evasion you got to nearly 100% avoidance for the duration now you get to something like 70%, it order for it to be any good one of 2 things needs to be done. Either make it miss chance increase or make it 100% dodge and reduce the duration to 8 seconds. Resetting Dismantle may be good in some rare situation, but its not something you would want to waste Preparation to reset, same with Kick and same with Sprint. I would much rather see 2 charges on Vanish and just a flat out removal of Preparation from the game.
I think the opening damage you could get with Marked for Death is going to be pretty nice, and since Versatility is such a colossal failure (it baffles me how this talent made it live) they could have put practically anything in its place and it would have been a more attractive choice.
I am really not sold on Cloak and Dagger especially for specs other than Subtlety. I think its far too spec dependent to be in the tree. It could change after playing around with it, coupled with Subterfuge jumping all over Silencing/Stunning 3 people around a node will be good support in BG. Not sure of how good itll be in Arena though.
Burst of Speed without a root break seems like its going to make it less attractive than it already is, although speeding around the map at almost mount speed in stealth should be entertaining.
Shuriken Toss not applying non-lethals is going to be annoying to say the least, I personally would rather see it stay the same as on live than for them to change it to this.
Deadly Throw might become more attractive not because of the interruption change but because of the change to ST to not apply crippling poison. So few classes hard cast it should be interesting to see how much use you get out of the range interrupt.
Blind back to 2 minutes, I heard this was because of ninja capping in RBG. I really don't think that is a valid justification, but I'm not overly concerned with a 30 second nerf.
Cloak of Shadows being 1 minute could be my favorite change of 5.2, rogues havent had cloak on a 1 minute CD since Wrath of the LK and that was if you talented it (which everyone did) and not a baseline 1 min CD since TBC. With the Glyph I might forget about how crappy Evasion is.
Smoke Bomb is a nice change and it really needed some sort of a buff/CD reduction. 3 minutes is just flat out too long for how Smoke Bomb works on live.
Nerve Strike reducing healing done by 10%, nice little buff don't know how noticeable itll be.
Shadow Focus nerf really doesn't seem like a nerf to me, the most expensive ability you can do out of stealth is Ambush and after this change it'll cost 15. Which you will regenerate in the global it takes to do it. So you will start your next ability with full energy anyway.
Vigor to 30 energy is a nice boost to openers and burst. It needed to be done, for far too long Rogue set bonuses have been very lackluster compared to other classes.
Blade Flurry changed to additional 4 targets instead of 1 is an understandable change. I'm not a fan but I get it.
Sub and Combat needed slight damage buffs to compete with Assassination.
As nice as some of the new changes are going to be they really don't address the real problems with the Rogue class at least not enough anyway. Evasion still needs a redesign. Recuperate is far too costly in resources for being such a underpowered heal over time. And we will still have too hard of time stay on target. Talents like Nightstalker, Leeching Poison, Cheat Death, and Deadly Throw will remain vastly underrepresented in 5.2.
I would suggest baselining Deadly Throw it has no business being on the tree especially where it is and replacing it with Deadened Nerves (10% DR all the time).
Nightstalker could grant 20% movement increase in stealth and 10% out of stealth and/or increase damage done for 3 seconds after breaking stealth (the damage buff is mostly wasted because Garrote damage is pitiful and you rarely open with Ambush in PvP).
Cheat Death in favor of a talent that makes Recuperate a passive effect.
Making Leeching Poison replace recuperate and increase the healing from the shiv heal to around 10-12%.
With the changes to Cheat Death and Leeching I would suggest allowing feint to be cast while stunned. Perhaps make the Glyph do that instead of increase the duration.