I've taken two classes since I was told I was putting too much energy into my pirouettes. You know what? She was right. Funny, that.
Not that I ever really doubted her. The question in my mind was more one of how to implement her suggestion. I started by just practicing the motion of rising from a plié to passé relevé with no rotation, with the goal of getting as upright as I could, and balancing there as long as I could. Then I added just a hint of rotational energy. It works for both en dehor and en dedans turns. The turn isn't rapid, but it's fast enough for class and it's stable.