There are a lot of solutions that could be implemented, countless good ideas. However almost all of them are much harder to implement then just turning the moon off on a few servers. If everyone understood how the game works and is programmed just a tiny bit more there probably wouldn't be as much complaining.
The Muertos Moon is enjoyable for many people. TLOPO has listened to feedback to try and minimize the problems people had with the Moon in a way that minimizes the risk of breaking things (seriously, changing anything with the caves and tunnels system is asking for trouble in POTCO) and that wouldn't take days or weeks to properly implement, test, fix inevitable bugs, etc.