I have been playing on the MoP beta. I do not care for the Pandaren race, but I am interested to see how adding a new class into the PVP mix will spice things up.
Every class is being nerfed and buffed in a nice cycle, but so far one constant remains the same. Locks are shining bright in this xpac. I am sure bliz is doing that to make up for the lack of lock players in Cata.