I'm still waiting for the feature to pick which coins you wanna mine profit wise, but I don't think it's coming anytime soon.
This ability is available via 3rd party app, right now. I use this method myself to mine between a handful of the available coins on Multipool. It is a Windows only app, so if your miners on on Linux, then this won't work for you.
The app is call CGWatcher:
https://bitcointalk.org/index.php?topic=185553.0With this, you can setup profiles for the different coins you want to mine, and then set it to check every 5-10 mins with CoinChoose, and it will auto switch your miners to the most profitable coin at the moment. CoinChoose isn't as accurate as Flounds calculations, but it is pretty close if you choose the "adjusted proffitablity" option.
Using this method, you can still use Flounds great pool, and mine the coins that you like, and avoid the ones you don't like.