This explains why, with a few exceptions, the BRs of premium vehicles are rarely changed, but still does not explain why the J-7D is not “OP”.
When I say “OP” or “overtiered” about a vehicles in the game, I mean that it has too many advantages over other vehicles sitting in the same BR, based on its disadvantages. Of course, “overtired” means the opposite. Probably the same may be true for most forum users other than myself.
Taking the J-7D as an example, the following fighters currently have the same BR as it.
The F-104G (ROCAF) and F-4F Early are clearly overtiered by most standards, so I won’t go into detail on them. However, the rest of the aircraft currently sitting at 10.7 BR are not, in my opinion, overtiered to the same extent.
Among them, the best F-5 variant at 10.7 is the F-5A (ROCAF). However, even this aircraft falls short when compared to the J-7D. In terms of armament, the F-5A is limited to two AIM-9P missiles, while the J-7D can carry up to four PL-5Bs, which significantly outperform the AIM-9Ps.
In terms of flight model, while the F-5A retains an advantage in turn performance, turnfighting is easily countered by energy fighting (BnZ), which is common at this BR. The J-7D, with its superior acceleration and top speed, can easily disengage or dictate the terms of engagement against F-5s or similarly turn-focused aircraft. The same principle applies when comparing the J-7D to the F-8E. While the F-8E’s AIM-9Ds are respectable, they still fall short of the PL-5B due to its limitations.
As for the Mirage IIIE, it does come with x2 Magic 1s and an R530. However, the R530 is not particularly threatening given the mediocre radar performance, and its missiles are easily defeated by kinematic maneuvering. The J-7D also has access to the same Magic 1s, so the loadout advantage is minimal. In terms of flight performance, the Mirage IIIE accelerates slower and handles worse than aircraft like the MiG-21MF, SMT, or the J-7D.
For these reasons, the J-7D counterpart cannot be said to reside in 10.7BR and would be more appropriate at 11.0 BR.