It is my sincere hope that they leave them alone, because I am making ADRs in the morning. HOWEVER...
I seem to recall seeing lots of threads last summer about them changing the EMH schedule over and over, even up to about 2 weeks prior. But last summer was the first time they offered both EMH mornings and evenings so maybe they have figured out what they are doing by now. They can move the evenings around all they want, but if they mess with the mornings I will be peeved.