I agree with OsakaWino.
No statement I've read or heard about MER being offered as a test for 2014.
It doesn't mean of course that they can't withdraw it anytime they choose however if this was a test you would think they had plenty of time to figure out by now whether or not to continue offering it in 2015.
All I know is my number of nights spent at a Hyatt has increased by 60% mostly due to MER.