Tanking classes
We have four tank classes, and we want them to be roughly equal. I say "roughly" because I don't realistically think with different abilities and mechanics that their survivability, dps and threat generation are going to be identical in all situations. You may struggle a little more in certain situations and other wow gold  tanks may struggle more in others. As long as you don't get to the point where the group starts wishing for another class to come tank, we're probably in a good spot.
We haven't seen a ton of evidence that warrior threat or DPS are much lower than the other tanks, but it is definitely something we monitor. We don't want to be in a situation where any of the tanking classes feels like the gimped class that nobody wants.
All four tanking classes, as far as I can tell, still have a lot of fear that they will reach a point where they can't do the MT job. That is a totally understandable point of view. We just don't think we're at that point for anyone right now.buy cheap wow gold 
Death Knight (Skills List / Talent + Glyph Calc.)
Dual Wield changes in 3.0.8
Scaling to infinity isn't an issue per se since we aren't going to hand out weapons of infinite damage (at least in this expansion). It's cool if Necrosis and BCB favor DW. We don't think they will drive all DKs to be DW, at least with gear available in Lich King.
It sounds like something didn't work right with the Killing Machine change, because the intent was to bring down the proc rate and make it more consistent between 2H and DW. We are investigating.