WTF are you talking about? The first WTI's to deal with the M-197 worked and flew with the 160th to develop the Navy's tactics for how to employ it. We also had the 2515th which over the time it was active was supported by 3 different squadrons, and never lost a patient. We had HS-14 and HS-10 conduct the EMIO detachment.
As for doing full exchange tours, I know of 1 guy who tried out for the 160th and got accepted, but PERS refused to let him do it. There is no appetite within the detailing office to send front runners out of the community considering how little time they give us in the cockpit in the first place. With that being said, there are guys in the community, and even on AW who have flown actual ops with SOF teams. I don't know what more you want, and I don't think you know what experience actually lies in the community.
In the end I think the real problem is that we merged HS and HSC without having an idea of how the process would actually play out and what the future of the community would look like. Too many stars stuck with the initial plan just because it was the plan, instead of asking questions or looking ahead. (Trust me, I've read the reports from the initial concept of the "helo master plan" through it actually playing out, and every report and survey actually said it was a bad idea and shouldn't be done.)
All the "tactical" HS guys decided to stay in their airframe as long as possible due to the early growing pains with the MH-60S and just assumed that when they did finally transition, they would all be golden children and the community would run the way they wanted it to. Unfortunately by the time enough guys actually swapped over, too many bad habits and ideas had become entrenched and now the combined community lacks direction. It also doesn't help that we have expeditionary HSC squadrons who can't find any work for their dets, so entire generations of some wardrooms go without a deployment for their tour, have no idea how the CVN or the rest of the Navy operates, and can't get any quals due to not having any flight time.