I'd say Crystal Beach is pretty dang awesome. Look at how many troubles it can give the early game Blissey by stopping the boosts. Then you got Empoleon with Scramble, Failtune with DRE, Delta decks with Casty, they all get stopped by Crystal Beach. Why not run them? After all, if they can't play their quick powerups, you get the advantage with your so-called "Slow" energy set-up.