Here is a dev chat log that was hosted on IRC with the World of Warcraft developers. Everything from UI modifications to the 1.9 patch were all discussed.

"Many players disagree with the new "Raid Schedule" in 1.9 I understand that you put it in place to stop cascading. However, you are now dictating to players when they "HAVE" to raid, which is never a good thing. Is this change something that you feel is temporary or can we expect to see this stay in place permanently? As more raid content is added to the game this "Schedule" is going to be more and more of a problem for raiding guilds"

Check out the full chat here!