Spec - Kinetic Combat, Shadow Tank
1. I think that after the 1.3 changes we are perceived as being the weakest of the tanking specs.
2. It is somewhat hard to tell because I have geared up, but I did notice a drop off in survivability after 1.3. That said, I feel the class has a lot of utility in PvP and does more damage than most of the tank classes. I can't speak to the high end raiding, but I haven't run into something I couldn't tank in PvE yet.