I don't know if this is a total misperception, but is 84 and 85 changing a lot? It seems like they went from a total reserve wet-dream for active guys to now an ever-increasing active command. Every selection-round, more and more of my friends are selecting 84 and 85, and I see a ton of old RAG IP types going FTS to 84/85 (including your OCS roommate, Master).
-4, -5, -84, -60, -75, HC-85 and HSC-85 have always been FTS squadrons. FTS=Reserves. FTS does not mean REGNAV guys, who also go to -84 and -85. Historically, there were a handful of FTS at all the squadrons and the rest were SELRES. As the war started going full steam, the closed little world of -4 (and eventually -84) opened up because they realized they didn't want to spend a port/starboard duty cycle of 6 months on, 6 months off in country. They started to get augmented by some REGNAV (while still mobilized, mind you) and then started progressing towards a ~50% REGNAV make-up. As HSC-85 started coming online and the the Rock mission guys left to go to HSC-21, they began also growing to a large percentage of REGNAV. Now there's actually a REGNAV XO/CO billet in the mix.
FTS hardware is, IMO, going away. It will take a while, but they seem to want to push REGNAV into the Reserve squadrons while also making it so that a lot of SELRES may consider leaving so they don't get mobilized...while also having to do some sort of deployment or operational commitment every year. This completely defeats the point of having Reserve squadrons, as they're the way to have a lot of experience that doesn't transfer every 3 years or have to go somewhere non-squadron related and lose currency. Even now, there's some that think REGNAV can manage and administrate SELRES, and technically they could, but it's being pretty horribly mismanaged right now (again, IMO...and others) at some (very specific) places. I think you'll always want to have FTS to take care of the SELRES, but it's slowly looking like they won't necessarily fly the planes (or even work on them).
Uh, what's a "Patriot Drill"?
You are correct. SELRES do work and not be compensated for it. COs (or OICs) and Chiefs will still have to do that at times, and some SELRES think it's a completely okay thing to do routinely, but it's a slippery slope.