Map voting sort of works for all maps. Admins need to set the vote threshold a little higher and it works. There is also a map voter weight that admins should reduce.
However the map repeat limit does not work. So the same map can get voted in over and over and over. Fix map repeat and the map voting becomes workable.
As for running more custom maps, I wish TWI would release a custom map pack with two or three custom maps each month.
I am still finding the player base mostly unwilling wait around for a 200 MB download, so for the Aussie / NZ sever I slowly add new custom maps, maybe one a month. Also I only add customs that are at a development stage when they won't be updated ever week, otherwise players that use SteamWorks get screwed over if I dont keep up the pace.
In the past I was updating the maps at the pace of mappers but was losing too many players to other servers just running stock maps.
At the moment of the 16 maps in the sever rotation, only four require download.
I suggest people keep getting on TWI's back askign them to continue with what they are doing with the map comp winners by delivering their maps through the RO2 update. This is definitely one of the best things TWI have done this year and I cant it as anything but a win win win situation for TWI, mappers and players.