I agree that growth is good and that's what keeps us interested in characters in the long term. However, growth can happen in two different ways. You can have seven very similar, basic, generic, two-dimensional characters, all of whom grow and branch out in different directions. Unified starting spot, seven arrows radiating outwards from the center in seven different directions. Or, you can have reverse the direction of the arrows and have seven different starting spots, with arrows all radiating towards the center. Seven different characters in different starting spots, all congealing into one unified generic stereotype over the long term. I feel that what Ellis did with Meggan was definitely the latter.