OK, I finished an entire campaign and I think final mission is a bit too easy comparing to original.
Original was constant 100% fight against wave and wave and wave of fighters and bombers.
Personally I'd throw another rag tag group of cruisers and freighters to take out by player (while Lindos mow the other one).
Also adding several more waves of fighters and bombers wouldn't hurt.
Overall this is great remake of great campaign.
I love the changes you made, the updates with INF:A ships and retconning to fit INF:Nostos storyline better.
The only thing I'd add is some next-gen rebel turrets, as FS1 blob turrets, even in greater numbers are nothing.
I love the rebel Phoenix V missile turrets are so deadly - in attack on Mars dual asteroids, that one gunship mow half of my wingmen in opening salvos - I felt fear in FS2 for the first time since very, very long ago and it wasn't Juggernaur, it was puny gunship!).