It was a bad change, it faces too many with flares and faces aircraft much faster than it. There is little a Sea Vixen can do most matches other than go for players totally distracted. Had a match the otehr day which ended with no Red tops even fired because I never once got a shot oppotuntiy , Come up behind an AV-8A, AV-8S, Ayit, Hunter F58 , etc etc and there is nothing you can do, absolutely nothing. Then you have the supersonics like the F-104 and Mig-21 that equally leave you rendered useless. Heck it msot often faces aircraft like the Mig-21 with the 2x R-3S which just destroy it if you try to climb.
If it belongs at 9.0 then most between 9.0 and 9.7 belong 0.7 BR higher than they are currently.
Because things that go up ,rarely come back down again.
Even if the Sea-Vixen was never getting a single kill it would never move back down. Look at the Tornado F3 year before last facing nothing but Mig-29s and F-16s with its 11.7 BR, I spent a year fighting for it to go down to 11.3, the same BR it had in RB, most agreed with me. Didnt move, wasnt until after it was facing Su-27s that it finally got improvements.
Britain has a track record making diamonds out of mud and so our vehicles are often over BRed. look at the Harrier Gr1 compared to the AV-8A or Challenger 2 vs Leopard 2A7.
Britain has WAY too many issues, nerfs, outstanding bug reports or dodgy BRs, so nerfing the Sea Vixen purely because its faster than most is just stupid. If speed and speed alone were the only metric for balancing vehicles then why is the Sea Harrier FA2 and the F4F ICE the same BR? Why is the Hunter F6 and F-104 the same BR? Why is the Javelin and Mig-15BIS the same BR?
When looked at as a whole. The Sea Vixen hold 1 advantage, it can run away. Take that away, what are you left with? Not a lot. Its a woefully underpowered aircraft without that one advantage and would need massive buffs to compensate like having All-aspect IR missiles.