I do think we have passed mass RFE stage. But RFE's cannot be ruled out for any reason. But chances of birth/marriage and vaccinations records RFE will be very less as majority of the cases got pre-adjudicated once.
Regarding RFE for interfiling cases after May 2012, logically they should not. But during the mass RFE from Texas even some of those cases were also included. I still think those RFEs were generated without adjudicating officers looking into the cases. Otherwise those many mistakes may not have happened.