I think the answer is quite simple. Gaijin has totally forgotten about Air Sim since the great compression and failed to move all of the F-14s to more appropriate BRs, Especially after they finally added a 12.3 bracket (which has resulted in the F-14A being 12.3 not Psuedo-12.7).
F-14B/D gaining 9M this last major update is just an extension of that. It got an upgrade that should warrant it being higher, but alas, they simply forgot Air Sim even exists.
Probably should be 13.0 until decompression occurs and aircraft like the Premium Su-30s move up higher.
and better engine… and other players cry iraf is good in 13.3 br because fakur is op yeah is good but u no have a normal ir missile and low amiunt of countermasure + in this br 80% maches play vs 13.7 or 14.0 planes good luck