Open the whole list up to random selection. It doesn’t work as advertised anyway.
Of the 6 groups of maps on Zombies Maps Overview, the last two groups of five have never been the default votes in months of playing.
Good maps are just sitting there mostly unplayed, because /vote only works if everyone votes the same map before the timer window closes, which is almost never unless you’re the only player in the queue.
Whatever its original function was, now it’s just a broken record playing the same 5 maps for days instead of the whole catalogue. If the Mystic Library and Cryptic Castle kiddies want their fix, they can vote for it, right?