Regarding the "official" map tag: Maybe it's just me, but when I think of the word "official map" in the context of SvenCo-op, I generally think of maps that were included in an official release, and not maps found in mappacks compiled by the Sven Team. I think people who go to check out the maps tagged with official generally expect the same thing as me, and considering the large amount of mappacks that have been released by the Sven Team throughout the years, the page for official maps is going to get very crowded at one point, making it even harder to find what you're looking for.
Sure, I guess it's just a matter of defining what a word means, but I think it would be better to separate mappack maps into a separate tag. Perhaps something like official-mappack. There needs to be some way to find maps that were included in an official mod release.