Eh, as long as Twilight doesn't start acting lofty and "better" than everyone else, I'm fine with her having more power/height/whatever. I think she deserves it. She is a pony that has studied hard her entire life, risen up in the world by helping others rather than stepping on them, and now has had her final "graduation" and is rewarded for her work by getting the best position in equestria!! Seems fitting to me! It's nice how supportive and happy her friends are for her.... that doesn't always happen in the real world