Why does Gaijin refuse to address Matchmaker and the BR system?

That was also air decompression + Su-25 going up, not related to ground.
Su-25 was very much over-performing in air RB at 9.7, and will stay 10.0 for air RB.
Likely being 10.0 for ground as well since it’s a rather middle of the road CAS aircraft at that BR.
1.5km dumb fired rockets isn’t as strong when you’re facing [my] Stingers, fast firing guns, and proxy rounds.

The BR change at that time did not result in a decompression of the Air, only a reduction of the top BR from 11.7 BR to 12.0 BR in January or February 2023 which didn’t give benefits for Korean War era jets.

It should not face against least late flareless subsonic jets and should move to at least 10.3BR, since its 2.5km forward is the deathzone for flareless jets.

That is what ended up happening due to the decompression in the ground, and you can see that some 9.7+ vehicles went up 0.3BR.

Well Su-25 isn’t going to 10.3 for air RB without further decompression.

True.

Hope they decompress 9.xBR after separation.