Well...I suppose...
No one's getting paid to work on any of this. Complaining that they aren't all done is like getting a boxed set of one season of your favorite TV show, then turning around to the friend that gave it to you and demanding "Hey-where are the other five!?"
The people who work on the models usually hang out in the Freespace Upgrade Project forum, and while they usually listen to constructive criticism, they aren't under any obligation to do any of this whatsoever. (As opposed to, say, use those talents for a job that they would be getting paid for)