It's gonna be tough times in arena. Blades edge quickly comes to mind. The new style will probably be playing extremely defensive. But it's the combinations thats got me slightly worried. The thunderstorm+deathgrip, or even 2xchained deathgrip. Still, I don't really think we'll see too many 2xDK or DK/Ele Shammy combos in 5vs5. If those rare setups play well, they're probably gonna be unbeatable with a 5xshammy team for instance. You'll probably not "own" the bridge as before. You could get pulled down, bounced down and pulled up, and the combos will just get frustrating.

Rushing team with unholy DK: You wont be able to nuke an unholy DK, unless he is sleeping on the job. And he will be able to run right up to your group with no real worry. Popping antimagic shell while approaching (5 seconds), deathgrip one of your characters, then continuing into the rest of the group. Pop antimagic zone on top of you (I'm not really sure antimagic zone will be a popular spec for arena though, probably not since it costs 6 talent points, a pretty severe dps drop). This must be countered with Fire nova totems, and only after they pop can you go to town. Now for pvp I assume most dk's will glyph so death and decay will have the 2 second horror effect randomly triggered. This effect kicks ass even in duels. Pair this character up with an elemental shammy or a destro warlock and you're in for some mayhem. We'll be suffering since the only option is to stay in a group.

Still going to be pretty interesting. Can't wait to see how Ellay will approach this. The new tier of talents, a new class, new team combos. Everyone starting fresh. Gonna be fun.