Sorry, pal, but the wide range of custom maps you are talking about is not as good as you say, except for a couple of them. I've tested a lot of 'em and all in all they are quite similar and often full of wrong objects in wrong places, like containers upon crates or level xings in the desert....just to fill up the map with something.
It's very hard to choose from them to create a good mappack which will be playable in a ladder and as long as there's no ladder, this game is dead meat...
However, as my italian friend Rook says, we are looking at it...