Digglez: Of course a map should be well made, having some far off buildings (usually) doesn't affect performance. There is a balance between creativity and good map sense. I rather have the few active mappers we have, make proper maps and 'downgrade' them if they don't work, then stifle them with 'performance constraints' (for most players, maps are fine).
CrazyCracka420: Voting is more or less meaningless. If you want to complain about a map, you post it in this subforum, preferably with pictures and some thought out arguments other then 'the map sucks'.
Dutchydave: Maps that are added in the server will be shown as "blank_x". There is no way around that. As time goes by and patches are made, maps are included in the mod and will show their proper names. The only advice I have is to make sure everything is updated. It should work (seeing as it works on the regular servers).
AlexTheDragon: Some advice are better then others, it's a general guide. You'll have to see what works for you.