No, because rember access to Galleries was never part of the T&C's, so technically speaking they haven't removed it, so bit hard to give 6 months notice of it's removal if it was never a documented benifit.
As one who enjoys splitting hairs with the best of them, I take your point but I think what we're seeing on QF's part is a real cop-out.
It's a name. To me, it's no different from Qantas going from QANTAS the acronym to Qantas the non-acronym. Purely aesthetics. It doesn't change the underlying product or service.
By your reasoning (which I respect) a BA Club World passenger could be denied access to a oneworld Business lounge because the person is flying Club, not Business, a decision based purely on name.
While Galleries access is not explicitly stated in the T&Cs, it has certainly been the case in practice.
This document, for example, clearly suggests (unambiguously, in my opinion) that Galleries access, at least in T5, has been possible for Qantas Club members (see point six in particular EDIT: point nine).
If we are to always take the QF website at face value, we'd be in a lot of trouble. Most of us could point to at least one inaccurate statement or piece of misleading information generated by the website. For example, the points calculator says QF doesn't fly PER-SIN, only JQ does. Wrong.
As I said, I think this is a cop-out. Given the handful of cases others have posted here about conversations with BA lounge staff, I think QF has seen the opportunity to save some dollars.
I know this will upset some, but I have never quite understood why Qantas should give access to BA and AA lounges to paid members. Sulrey paid membership should be just for their own lounges, or lounges where the passenger is flying on Qantas, which is allowed in London T3.
I think this has to do with the JSA (in BA's case) but I'm not up with the detail.