A Korean Arena team named Kill e A has dropped out of the upcoming Extreme Masters tournament and claimed that they just can't compete with Death Knights in the Arenas. "Due to recent balance changes resulting from the 3.0.9 patch, we believe that it is no longer possible for the Mage and Rogue character classes to remain competitive in a high-level PvP setting," says the statement posted on the ESL's site. They go on to say that "our testing has shown that it is now impossible for other classes to compete effectively with the Death Knight." Since they don't have a DK player and their team's strategy is based around using a Mage and Rogue, they're out, and another team from SK Gaming is in. The SK Gaming team will be running with a DK, and they say they're certain they won't be the only ones.
And Kill e A isn't the only team dealing with the power of the Death Knight. Gotfrag has an interview up with Rumay "Hafu" Wang of Fnatic/Orz, winners of two big tournaments last year. She too says Death Knights are a force to be reckoned with, though the recent changes might bring them down a notch. Plague Strike, as even the NPC Death Knights say, is a Lifebloom-killer, and Hafu says that as a Resto Druid in the Arenas, she can't match them.
Blizzard will definitely be watching during the upcoming Arena tournament -- if Death Knights are as overpowered as these players claim they are, we might see some PvP-based nerfs in their future.