I used to post on baseops before I got my pilot slot in 04, then I got busy flying/doing the dreaded masters, and now I have more time, especially as I'm on my 8th deployment (4X enlisted, 4X pilot). I only mention this to provide background/anti-troll info about myself.
As far as civies in the AOR goes, it's not new. I wore civies when I was deployed to PSAB in the late 90s (yes as active duty); PT gear didn't exist then.
That said, I see what you're saying that the transition to civilian clothes might imply a more permanent stance at certain locations. On the other side of the coin, it's nothing new. I think it could be a (belated) tactic by the new CSAF to alleviate some of the BS everyone's put up with for 10+ years at certain places. Hell, maybe he is projecting that "illegal" morale thing, I don't know.
Whatever the case, I'm just saying IMHO that the policy shift might actually be a morale issue. Don't know for sure, just my guess. We weren't ever leaving that part of the world anyway.....again I was deployed to the Middle East in the late 90s and I'm still doing that.....