Hi again, I found a couple of issues on my playthrough.
When talking the the Highwind crewman that explains the ship controls, if you pick the option to have a chat with him, you're presented with the following options:
The cursor is on "Not interested" by default, if you selet "Okay" nothing will happen, and if you select "Not interested" you'll get the explanation of they the crew of the Highwind sided with Cid.
The other issue is that when getting the Neo Bahamut materia in Cosmo Canyon, the Observatorium music stops but never resumes.
And finally, if you go to the Altar where Aerith died, the game will crash when transitioning from the first screen with steps to the second. Music freezes and screen goes blank. Lost a couple of hours gametime to this one because I'm an idiot and didn't save.