Crab how many fitness tests do you do? When I was serving fitness tests were generally annual events as was your Annual PWT, WHT, etc.
my 'In my day' statement was an exaggerated joke - maybe I should have added some smilies or something
A major problem with the RAF SAR world was that once you were in it you rarely left it, and therefore with the exception of a quick few weeks hop down south, they didn't deploy. Bouncing from one flight to another isn't really what the mil is about, so civilianisation is the right option.
So, eventually after 10 years or so, you will have the depth of experience that milSAR had - that was the point, it was a service with a specialist core so that others could bounce in and out of it (and many did, despite what you assert) - any dilution of experience was minimal
What you have now is a very few moderately experienced people (standfast some of the rearcrew) whose experience is further diluted by those from SH, junglie, Oil and Gas and a number of others who claimed SAR experience from things like MERT and some with bare minimum (after trg) NVG skills.
Eventually, unless you get a lot of further changes, the experience levels will build but lets not pretend that that state will be reached in a few months or even a couple of years.
How many pilots in Bristow SAR have more than 10 years UK SAR experience (recent experience)? - that's what was removed by civilianisation.