This is honestly one of the best ideas for subclass balancing I've heard in a while. The idea of a rock paper scissors where each subclass has a certain counter would really make choosing a certain subclass more important. As it stands right now striker is the most powerful subclass in Destiny. You are right because as soon as Bungie nerfs something another subclass comes out on top. Then people start complaining about that subclass and the cycle continues over and over.