Yes, I certainly agree with all that's been said above about the immersive aspects of the campaign, and about the strange sense of caring for one's virtual wingmen :yes: .
For my part, I'm well into a LafEsc campaign now, flying N11's over Verdun in May of 1916. My AI wingies can now fly the N11 well (thanks, Winder et al for the AI N11 1.26 fix!). I always lead my flights, and my evolving practice is to "stay high" when a dogfight first develops. Given that AI enemy a/c tend to dive for the deck right away, I can watch over my wingies below in the first stages of a fight, then come down to help as needed.
Is anyone else noticing that an improvement in their own flying skills as time goes on? In the old RB3D days, with the POV hat views I could never stay alive long, nor achieve many kills. Here, with TIR, I feel that my SA is growing by leaps & bounds. When I first started flying OFF3 with TIR a month ago, I always kept the TAC screen up, and used the enemy cone, otherwise I had trouble staying alive. Now I've stopped using the enemy cone at all, and I use TAC only to locate enemy formations so I can fly toward them, taking it down when I get in a scrap. And I think that soon I may stop using it at all.
Reading Shaw's Fighter Combat, as recommended by many in the forum, has helped as well, though I find that with these low-powered aircraft, particularly the earlier ones like the N11, many of Shaw's options are closed to me. But boy, the N11 is a great little turn fighter ...