As the random person who walked in off the street from very far away I shall offer my most delectable opinion. Map voting at the end of each map is horrible as the server ends up trapped on dust and aztec and office and assault. However adding the rock the vote ability would be dilightful as sometimes everyone is tired of the map and we want to change it but we have no way to go about doing it. The idea here is that the map rotation would stand as long as everyone could stand the map but if we hit dust(either one) for the bazzilionth time it might be nice to have the option to get it changed. By only having RTV and not a vote at the end of each map you can ensure that a certain level of motivation has to be present in order to initaite a map change. That would seem to me to be the best way to give you an efficient way to change the map should it prove needful as well as preventing constant voting for maps which would be quite annoying. It might also help if some other maps were introduced to the rotation such as port, nuke, tides, and multiple others.
~Killty-Chan