CA/GRS has always needed Met Observation certificate.
The old section 14 of the MOS didn't say that:
14.2.2.1 ............ Therefore, applicants for the issue of a CA/GRO Certificate must hold, or have held within the last ten years, an ICAO recognised Air Traffic Controller licence or an Australian Flight Service Officer licence.
New section 22:
(3) An applicant for certification as a CA/GRO for this section must hold:
(a) a flight radio operator licence or an approval under Part 64.B of CASR; and
(b) a Bureau of Meteorology Class A or B weather observer’s qualification;
and must also hold or have held:
(c) an ICAO-recognised air traffic controller licence; or
(d) an Australian Defence Force qualification equivalent to an air traffic control licence; or
(e) an Australian flight service officer licence; or
(f) a CA/GRO certificate previously issued by CASA.
Have always needed to see the runway approaches, but under the old system needed to be able to see the entire circuit.
You would think so, but, old section 14:
14.2.3.4 A permanent CA/GRS must be provided with the following facilities and documentation:
(a) a suitable work area that provides the operator with a full view of the manoeuvring area and circuit area;
New section 22:
(5) A CA/GRS permanently located at an aerodrome must be provided with the following facilities and documentation:
(a) a suitable work area that provides the CA/GRO with:
(i) as far as practicable, a full view of the manoeuvring area and circuit area; and
(ii) a view of the manoeuvring area and the approaches to the runways;
(My bolding) It's one of the details specifically listed in the summary of MOS changes, along with the updated application requirements.