I agree to Ditzy staying in the background. If I am not mistaken, her eyes were an animation error, and it was the brony community who let her stay that way and showed us that Hasbro does truly listen to their fan base, which also gives the fans a sense of pride. However, while I do not see the name "Derpy" as offensive, I can see how people would see it as such. I personally refer to her as Ditzy Doo because it sounds much more adorable than Derpy Hooves.