In the course of a war, there will be many battles. Some will be won, some will be lost, but both sides keep coming back.
In the course of a game, there will be many battles. Some will be won, some will be lost because it's supposed to happen, some will be repeated ad infinitum until they are won.
I would like to be able to continue after a failed mission, and face the consequenses of not blowing up X or saving Y. I'd like to be rewarded for keeping wingmates alive. I'd like to see a mission succeed even if I should eject in the middle of it. As has been said before, immersion is the name of the game (aka SWC), and not having the universe revolve around Rogue/Aplha 1 (also previously mentioned) is my definition of immersion.