Quote by Story: "Developers make plugins, not time machines."
If we could, we'd love to be able to have everyone that once played, play on the server again. We'd love to bring back all the games.
Why don't we, you ask?
Although it's undoubtedly already mentioned above, we can't control people and have them play. We don't have the player counts we used to, so our system that was built for 10K+ average would not work with our current 2K+ average. We can't turn it back.
Another thing which was already mentioned above: The biweekly rotation system will grant players a chance to play the removed gamemodes for two weeks. That's about all we can do right now.