And 2014 and the MRT is still not included in the Rabbit Card.
I note the Rabbit Card is still being sold for 50Baht (permanent discount) plus 50 Baht deposit. Seems to save 1 baht on some cash fares, but is more for convenience during peak hours.
Also note that it is possible to load multi-prepaid trips onto the Rabbit Card (but unsure what occurs if you are actually taking shorter trips that are cheaper than the bulk fare)