The rules for map submission would be simple:
- Must have account to be able to submit a map.
- Cannot submit more than 1 map every 10 days.
- Maps cannot introduce new textures (or at most, there are a maximum of new textures introduced per map to reduce download time).
- Must submit to Guild Wars theme, which is to say, no spaceships themed maps etc.
- Map is subject to a review before being accepted.
I think in doing so, you relieve a large burden from the development team and you make Guild Wars 2 a far more flexible game.
Thoughts?