Will you be changing Heroics then?

We didn't implement any across-the-board nerfs to Heroic dungeons based on player feedback. Some encounters were more difficult than others, some trash pulls were too unforgiving or extraneous, etc. After being able to review statistics from a much larger sample audience, we determined these changes better reflect our original design intent. On the same note, as Ghostcrawler mentioned, some bosses were easier than we expected and are being buffed.

All of the specific changes to dungeons or boss encounters are being made to better align all of the Heroic dungeons with our intended difficulty level.

The Luck of the Draw buff, however, is being made in response to the feedback we're seeing on the forums, as well as the statistics we've been reviewing which reflect all types of dungeon party trends. We feel it's a good way of closing the disparity between the success of pick up groups and the success of preformed groups, without trivializing the content for some players to appease others.