Think It would be best to talk to gunjob as he is the man with the full explanation of it all.
It its really advanced compared to the Gr.3 HUD and would be really cool to see it all in game.
At least from my reading of that part the CCIP has 2 different sights for bombs and guns.
Only minor details someone would pickup and notice if they spend far to much time looking at the real ones in museums and historical footage lol.
Like the differences in the Shaping of the fuselage that happened with the first Pegasus upgrades after the Mk101.
Essentially every Harrier in game is an AV-8A with slightly different parts here and their. The Ailerons where also bigger than the flaps but in game they are the same size.