I cannot state anything here as I don't play on live nor on beta at the moment, but I've been tracking class changes quite thoroughly. Correct me if I'm wrong, but since the changes made about one and a half month ago (fury, arms, feral changes) no other major changes were announced. Plus, a mere month ago ferals' rip was ticking for 6k and shadowpriests were the closest class to be called overpowered in a long time, wouldn't call them first in line to be buffed. Adjusted, minor changes, maybe.
Having that said its obvious nothing's set in stone, but observing Blizzard's policy in the last 4 years I wouldn't expect any major changes that players long to see before the expansion to be made. If things turn out to be as needing adjusting as they do now, it will be done in the following weeks of the Cataclysm.