You don't need to have anyone else change your D3 to switch to another pool. Just point to a different pool on your configure miner tab of the miner's web interface. You could also point to NiceHash or a coin switching pool like zpool.ca which automatically chases the most profitable coin at the moment. You may need to learn a bit more about configuring ASICs, but don't be discouraged. It will make sense. Your D3 can only ever mine X11 coins, but it can easily be switched to mine any of them by just pointing them to the right stratum server. Also, the most profitable coin long term is often not the most profitable at any given moment. What matters is the price when you sell.

Good luck.