Working as a team with the same people everyday is important. Even though you may have good and experienced modelers, texture artists, programmers, etc every time you get someone new on the team the flow of work has to shift around and resettle before it can become efficient again (which actually slows things down rather than speeding it up). This I'm sure is probably reason number one for why the devs are not quick to implement more of the types of people they already have anymore (Unless it is something they lack very badly). and once everyone has got a feel for how their coworkers complete their individual tasks you develop a workflow between each other. Everyone knows what is expected of themselves in their respective 'stage' in the assembly line so that new worker doesn't have to stop and rework his stuff when its not ready for the next person to work on. In this sense, I completely understand what Masakari and Defender are saying. But rock on with the community art stuffs, just don't expect MWLL to take any active part in it at all, other than commenting on it. I don't think that the MWLL team could really do any better or faster than they currently are with their work.
As a side note, for the people who think that things could be done better, maybe they could. But I would like to make this challenge, look around at the other games coming out currently. I don't see any games being made by people who are paid to do this coming out with anything that looks cooler than this does. Especially anything involving so many vehicles, aircraft and freakin' HUGE robots! =D
fyi to the original poster, this isn't meant to be a knock on your original post at all, I understand what I think you meant.