I'm not going to preview the changes here, but I will say that the next PTR build has some dps warrior changes.
1) These are not all the changes. We don't expect these changes to bring up Arms alone.
2) A couple of the changes have significant ramifications for Battle Stance.
3) A couple of other changes may seem cautious. They are. If they work then we will consider buffing them even more over time.
Sorry to be so cryptic. You'll hopefully get to see for yourself soon.