My main suggestion is to tidy up the vehicle lists - with dynamic loadouts there is no need or justification for having multiple versions of the same vehicle for each different loadout or skin.
It’s a hangover from Unsung and it makes the list difficult to navigate and messy - also results in strange moments after using the pylons system where there is a ‘F-4 Phantom BMB’ armed with AAMs etc.
Tidying that up would bring SOG-PF in line with basically every other Arma CDLC and mod, and would look a lot more professional.
Same with the Mi-2 being listed as ‘Mi-2 Hoplite’ - yes, I get this is a US-centric release but the North Vietnamese would not have been using the NATO reporting name for their helicopters, and to see it in-game when playing as NVA is jarring and comes off as lazy.
Beyond that...
A-1 Skyraider and A-37 Dragonfly would be good additions - not just for the US, they also give ARVN some air power.
An-2 (with armament - rocket pods and the ability to drop mortar rounds like the helos can drop grenades) for some Site 85 vibes.
MiG-17, MiG-21, and Mi-4 as another helo for NVA - this would balance the air on all sides (blue, red, green) and add more options to MP and for mission designers.