The Army did the same thing with the HH-60M. The UH-60M was a great improvement over the UH-60L, but the medevac shit they put in the back of the aircraft came from a bunch of O-4s, O-5s and maybe O-6s that had never really done medevac. We were one of the first (second I think) units to be fielded the HH-60M, receiving our first aircraft in 2009. Almost 13 years later we are the first unit to receive a prototype med interior geared more toward real world.
Six moveable litter pans in the original configuration "seemed" like a good idea. After all, if one or two is good, six must be better. Except that they were heavy, took up space and weight that we needed in a high DA environment. Oh, and do you think one medic and a crew chief can actually work on six litter patients enroute? OBOGS? You need to be able to transfer the oxygen bottle with the patient, not disconnect everything and send the patient inside with...nothing? Built in suction system? WTF? Who's going to clean that out in the aircraft when it's 100+ degrees out? Spraying out the back of the aircraft with water is bad enough. Blah blah blah.
It seems we, the military helo community, send our "those that can't do" to teach and procure things for us, because...well...they can't DO. Then they teach everything wrong and buy all the shiny stuff that is on the shelf at the 7-11.
As for the contested CSAR aspect, we in Army MEDEVAC are already training for this and our aircraft are being modified to better handle some of the contingencies. Of course this comes with added weight. I guess it is good that our prototype med interiors lost half the mechanical litter pans!