the f4s ( which is an upgraded j model so it definitely has PD ) is lacking its much needed aim9L,s( historical armament btw ) and pulse doppler radar, it has no standing chance against enemies such as the mig23 and mig29 without a decent IR missile and pulse doppler radar ( no!!! head on mode is not real PD ) its insane to add a 1980’s variant of the phantom and give it 1960’s armament, and especially when you make people pay 70 dollars for it, whilst simultaneously the mig23ml gets SIX ALL ASPECT MISSILES THAT ARE CAPAPLE OF PULLING 20’G OR MORE.
also the apg59 was integrated into the AN/AWG-10B so that needs changing as well
Cant speak for the radar but gaijin often limits what planes can carry for balance reasons. Easiest example is how the f16 cant carry every aam it can carry irl. They probably want to keep it at its current br and giving it better aams will move it up.