So, I have been using Asa as a PvE spec only, managing to pull about 50k DPS scoring 5th or 6th in Sha raids with my mostly quest blue/green gear.
I went Subtlety for PvP, which in my case, mostly consists of ganking people while they are questing as I do not have the time to do organized PvP. Subtlety is the most "Rogue-ish" spec IMO, it's still the closest you can get to Vanilla Rogue as played by Ming. Vets probably remember Ming and his cookie cutter spec in 2006.
Anyway, even by using Sub's major CD (shadow dance) and by making optimal use of rupture by keeping it up (+16% damage), Sub's PvP damage is, quite graciously, pitiful.
I couldn't even kill warriors who had 5 or 6 mobs on them while doing the dailies and were at less than 50% health. In fact, I could not kill anything else apart from...other rogues.
Frustrated, I tried Assassination today, and OMG, all of a sudden my skill as a Rogue went up by 158% or so. By spamming Asa's CD's *SB+Vendetta) alongwith the level 85 on use PvP trinket, I managed to SOLO a warrior and even solo a Shadow Priest.
The SP died so fast that he didn't even have time to understand what hit him. Of course he was at 65% health, but this is a MAJOR improvement over Sub's performance. As Sub, it would have taken 4-5 Sub Rogues with a healer to kill a SP in full PvP gear and maybe a 10 man raid to kill a warrior.
What's your experience?
(I am in full Contender's PvP gear while questing and I am using 2x level 463 heroic weapons)