Make it so that vehicles get a lower/higher BR depending on what modifications they have researched.
For for example:
A stock F-4E with 2 AIM-9Es gets moved from 11.3 to 10.7 or 10.3 and then once you get the AIM-7s it moves to 11.3.
Or stock tanks top tier tanks are .3 or .7 BR lower until APFSDS is researched.
It is kind of like how arcade and realistic have different BRs, but just based off of modifications. Cause really a stock vehicle shouldnt be the same as a spaded vehicle especially at top tier. It would eliminate the “stock pain” that comes with just about every top tier vehicle.