I am a pretty big fan of Aircraft games, so saying that the types of missions you can play in an air combat (such as Squadrons) game caught my ear.
There are all sorts of missions in a lot of aerial games. Some examples include, escorting other ships, A to B missions, destroy specific targets, landing missions, scan a target, etc. There are a lot of potential variations that COULD be made in a Star Wars fighter game. However, gamers probably mostly want to play furballs against other live players.