The "Random" vote serves no function in map voting but to potentially prevent players from playing a specific map they would like to play because they have been outvoted by a greater number of people who don't even care what map is up next.
Please remove the Random Map vote from map voting.
Also, please reduce the timer on map voting - it is way too long. 10 or 15 seconds would be fine. The less time looking at menus, the better.