High-G exists only on 6 onwards, while Post-Stall exist on Assault Horizon (scripted) and 7 only.
That said, at least you can experience how AC originally plays out. Despite it feeling mechanically outdated, there are some minor details in its mechanism that AC7 purposely downgraded to entice AC7 players into fully using High-G, guided weaponry, & plane modifications.
Once you finish the PS2 trilogy, don't forget to check out the original PS1 trilogy too. Despite not having SP Weapons there, I guarantee you'll feel more sense of speed & a less Hollywood approach of storytelling in there--something we may see a return with RB-D2's Wingman.