Also, on the whole quality vs. quantity issue, I just counted the number of custom maps in use via RTB server browsers, and only 28 out of 82 servers are using custom maps. 17 of those are slate edits (I think, I may not be up to date on every single name of every slate edit.)
If you want to make custom maps, it looks like you'll need to put in allot of quality for people to actually use it. This isn't like weapons of vehicles were you can have any number of them, with maps you only can have one at a time. So if people are choosing what map to use, they're going to go with quality. Making a ton of maps won't help anything. Making a few quality maps will change everything, since people will actually use them. If a few people use a map over and over, more servers will start using that map instead of playing with it for a minute or two, getting bored then just switching to slate or the bedroom to have fun.