And in response to your first questiong...
I like seeing deep arms for several things. 1 second wind, 2 imp intercept, 3 tactical mastery, 4 MS.
Just off the top of my head, a
57/14 build seems ok, but I'm considering the usefulness of shortened Overpower CD and the use of Rend in PvP. They feel kinda like a PvE/Grinding talents. But a 41/30 build looks fun too, I just have no idea until later in the game what kind of spec will do well in arena and bg's. It depends a lot on itemization of gear, what kinda of tactics are used or changed, the different classes got respective changes and the skills that they have at their disposal.
We may see people speccing for survivability primarily, and throw up the MS debuff on the main target like in the past. Or we may see warriors take a heavier DPS roll in the future.
Don't be surprised by prot warriors in PvP. They got some nice and nasty tricks coming for PvP now. Shield slam can be some pretty sick spike dps, while spell reflect is always ready on your whole party, an AoE cone stun that does good damage, and mobility on top of everything (zerker stance intercept AND charge, defensive stance intercept AND charge!).