I find that Gaijin needs to begin focusing on Air Arcade for its BR system. Missile tier planes perform similarly anyway, and they should just port the BRs from RB to AB.
Here are a small collection of them. Top is AB, bottom is RB.
This is really bad and creates situations where, when using a super downtier (pairing a reserve plane, creating a .3 BR reduction)
(the source problem is still legacy BR)
MiG-21 R-13 can face MiG-9
F-14A can face F-105D and A-5C
MiG-29G can face AMX A-1A
F-4S can face Yak-38B
F-18 can face MiG-21BIS
F-14 IRIAF can face F-4EJ and MiG-23M and AMX A-1A (mind you: not ML)
F-15A can face Su-24M
F-5C can face F-84F