my point is that if you make a sim with a couple of really detailed planes in there, you could make it more appealing just by adding in some already-made planes. They would make for more interesting AI, and you could fly them too, because I found they are just as good as some of the stock planes.
Thog, the problem (as far as I see) isn;t making other planes flyable: you can tell that just by looking in the downloads section. I think everybody is trying to decide what to do with this sim, what the focus should be, ect. Also, a storyline is a good idea, but it'd be tough to integrate (I think) and we don't really want another Ace Combat.
However, adding a charachter for a campaign wouldn't be a bad idea. It could help showcase the highlighted planes.