I don't think we should just accept what we can get. Then the show is going to stagnate and get boring because there's not really any improvement.
But, as I've mentioned over on the mlp subreddit, Sunny's expression for Nightmare Moon is spot on. Also, I love that the audience is actually scared and without reading too much into it, it means that they at least have some notion of who she is, which is really cool to see.