Devastate will remain the same in patch 2.1

"The change to Devastate in 2.1 is being reverted and will not be a change for the patch once it goes live. We've done some additional damage testing and the output is in far excess of what we had thought it would provide"

Not really a surprise tbh. But still, sigh..

http://forums.worldofwarcraft.com/thread.html?topicId=96001547&sid=1&pageNo=8