Ignore the concept, I'm sure you can name a movie that has a amazing concept that sucked and a movie with a crappy concepts that was good.
The quality of anything form of media has almost everything to do with the people behind it, the producer, the director, the voice actors, the animators and the writers and to my knowledge all the people behind My Little Pony love and respect children's programing. Its brilliantly written, the voice actors are top notch and the animation is great. Sure there is a slight sense of Irony but this show was written for Little Girls and Adults as stated by Lauren Faust, this show doesn't insult little girls like the other stuff made for them. The Fashion addict treats it as an art form and isn't obsessed with shopping, the shy sensitive one can be strong when the time arises, and I won't bother you with the details of all the other characters.