I've played through the retail campaign several times, after which I became aware of FSOpen and played that as well. However, aside from graphical changes, and a few options available in the launcher (3d radar, ship rearm time), I haven't noticed any significant changes to the campaign. For example, wingmates still don't fire their Trebuchets, or use weapons inefectively (like using a morning star on a fighter without following up with missiles), some missions are still not very polished (like no beams for escort ships in High Noon, Tatanen can avoid destruction in The Fog of War, etc). Is it the case that there is an updated version of the main campaign somewhere to download, or some separate updates to individual missions or AI Improvement mods?
I'm asking primarily because I'm interested in experiencing the new features of FSOpen. And also, I want to make my wingmates fire Trebuchets. Seriously, it was so irritating to watch them just sit there in the last few missions with bankfull of Trebuchets!