As some people already stated we could use some more missions.....and while id say there are people who have created lots of missions many of them never uploaded them...
id like to create a list similar to that we have for mods but mainly for single missions or small mission packs that would add some more fun to the already very re-playable game...
if you dont know where to upload your missions a site called Dropbox is quite useful tool for this because you just put the file with mission into a folder and then share the link which allows anyone to download it and updating is as simple as putting in new version of the file in question
https://www.dropbox.com/people who play the missions would then post 1-10 score here and once 3 or more people vote for mission in question id do an average(updated as votes pile up) so people know the rough quality of that mission
and if Alex and creators of missions that get exceptional scores agree they could be eventually integrated into the game or maybe even into the campaign itself if they are truly innovative....
what do you think? id be happy to include any ideas or suggestions others may have