I disagree quite heavilly with u there. I think ED should release some dev tools to allow us to edit terrain, scenery, textures/models, and possibly even let us try to add our own planes.
There are ALOT of talented people out there with alot of time on their hands that could work together to put new planes into the game at the same quality that ED does it.
And after all, it would come down to the player what mods they install into the game. So if they really want an x-wing, they can have an x-wing (somehow i doubt itd ever happen, be fun though :P )