As we all know we always loved MLP episodes, unfortunately, the structure of the episodes are growing old. We pretty much knew everything about Mane6, Spike and CMC already. That's when wings come in, it adds new variation and something we can be interested to know about. Take a look at what Meghan McCarthy wrote:
'But don’t worry, Pony fans — though Twilight will undergo a physical transformation, her personality will remain the same. “What we didn’t want to do was change who she is as a character, because she’s certainly someone that everyone’s proud to know and love,” McCarthy says. “I don’t think becoming a princess really changes her; I think it’s going to introduce some new challenges for her.”'
And as she says, she will have extra pair of wings and nothing else, she won't be OP or Mary Sue. And that princess dress? She'll probably take them off when new season comes out.
Seriously, though. Can you imagine Twilight learning to fly along with Scoots? That would be so AWESOME!
(Had to admit I didn't really liked Twi's design of wing, btw.)