Having done an MR course with some members of the RAF MRT I can do nothing but praise them. There is a lot of commitment and sacrifice to the role which for some (many?) is in addition to their normal duty billet.
I can see how the bean counters in binning MoD derived SAR might also seek to look at the MRT; however they do also have a function regarding the security of the site of the crash site - which might not be best filled with some of thev(excellent IMO) volunteer civilian MRTs or even the Duty Officer and whoever they can rustle up.
Still, if they opened up a trade akin to the USAF PJs this might be the best of all roles for both CSAR and MAC P.