I've gotten the sand golem on my last game. Its all in what you make of it. It was a nice savior for the RPG aspect, but I intentionally didn't go looking to steam roll the opponents.
My opinion is if you think it is over powered, sell it or don't use it. This applies to any strategy that you think is over powered. They put things in like this to help people that are having problems with the level of difficulty, but you as a player can choose to not use those things. Think of them as a personal cheat.