Tom, by your handle, I'll assume that your real interest is in Naval aviation. Yeah, it's in here, but to be honest, that isn't where this sim shines. The F-18 cockpit isn't up to the standards of the F-16, which I think is just incredible. (Still can't believe those dynamic shadows).
The F-15 and A-10 'pits are very good, but this is still, essentially a study sim. Learn the systems and the airplane. That's where the fun and challenge is.
I still can't believe what they've done to this.
I wish I could answer your question about the framerates, but I have a pretty good system, so it's no problem at all with a sky full of jets.
I'm expecting to see your name popping up with a whole lot of questions.
"From our orbital vantage point, we observe an earth without borders, full of peace, beauty and magnificence, and we pray that humanity as a whole can imagine a borderless world as we see it, and strive to live as one in peace."
Astronaut William C. McCool RIP, January 29, 2003 - Space Shuttle Columbia