In fact, the whole state of warriors on the PTR is pretty static. They've decided not to change stances and how rage interacts with them although I can attest that yes, they've added armor pen to battle stance (I was running around Un'Goro on my tauren looking for the Ravasaur trainer) and they've already fixed the potential TG bug I mentioned so that there's no way you can switch specs and have both 2h weapons equipped. Shattering Throw is indeed fun in mass PvP: I haven't had a chance to test it yet outside of a few melee's around a summoning stone, though.
I did get to make that one ret pally very unhappy, so yes that's nice. But all in all, I'm still waiting for arms to get, well... buffs. Yes, all three stances got small to medium buffs, and there's talk of removing the penalties altogether on stances. I won't pretend I won't welcome the day where stances don't have penalties aside from the rage dump aspect of switching, but that's hardly a buff to arms warriors.
We've been told repeatedly that arms warrior DPS is too low in PvE. And I know that they can't think that changing Taste for Blood to a 100% chance to proc with a built in 6 second cooldown is going to do it. Buffing Blood Frenzy? Not really enough. There have to be arms changes somewhere at least going internal testing.
So when do we get to test them already?