With all due respect to Jaymod servers, I don't really like this idea. I feel like people still want to have a word to say about the next map.
And like Rendel said, globally, Beg#2 has been doing well recently, with many players (regulars and new preys), so I wouldn't dare to make such a change at the moment But it's interesting, I didn't know Jaymod servers worked like that.
I have an idea to encourage people to vote for different maps:
When we are on the screen to vote for the next map. Most of these maps are disclosed in the same "boring" style (like a dark grey font over a light grey background).
Maybe we could add a catchy sign in front of the new maps to attract the eye. This might encourage people to try to vote for different maps. Example below:
We could also use a specific color code to highlight new maps in the list of voting maps.
I don't know if this would be easy to do (from an IT point of view)
Other than that, I just wanted to say that I personally don't mind playing 2 times the same map during an evening. As long as there are at least 6 maps in between. So I would agree with Phantom and Cheep to set a minimum delay before the same map can be played again.