Truthfully the longer you’ve played CS the less big of a deal this issue of maps being played on a rotation becomes. You’re already bored with the game and as long as it isn’t the same map repeatedly you’re good to go.
The most crucial thing is that it is a balanced rotation.
If you plan on creating a bot for voting of some sort go for it and experiment for a little bit, clear the stats and observe. Rock the vote is not that great of an idea in my opinion because it’ll go back to the same 5 maps unless you limit and say the map can’t go back until 5 or 6 more maps afterwards.
Also map voting the way it is right now isn’t going too well. Voting custom/regular. Once it’s on a custom map usually the people will want a custom map again, same goes with regular maps. The only way that I can think of to create a balanced voting system is really ridiculous.
I say ridiculous because I would suggest adding all the maps from your maplist and eliminating all maps that have been played within the last four change ups. All custom/regular maps would appear with a symbol to vote (a, b, c, 1, 2, 3 whatever). But also this could end up getting like 3 votes for a map and it winning because there would be such a large selection.
I would say come up with a list of maps that statistically show in your server a spike of people who join right away (in the beginning, AKA a map that brings people in). Then if you want custom maps add a few that you think may do well but just aren’t played enough because the regular maps in the server are dominant.
Do what you want it’s just a long suggestion that may or may not be organized because I’m just typing and staring at a Foreman Grill.
I’ll just end it with saying that when I ran a server (when people used to play cs) a balanced rotation always worked. I’ll be in IRC if you want to question how stupid this post is.