I have played many games with epic events cranked way up and haven't had one happen in a long time, I had 2-3 in late beta, but not since...
I would like a frequency option on game setup to have a world changing event happen every fifty turns or so. Make it +\- 5 turns to make it a little unpredictable. Call it Path of the Comet or something to reflect the cyclical nature of it. Just to make things really unpredictable.
Thanks!