I had only seen Surprise once since yesterday, now I'm bumping with a couple of deviations of her X3 I'm guessing she's a pegasus version of Pinkie Pie? x3 man... Giving wings to best pony is quite an insane idea xD Pinkie Pie already has tons of energy and launches to the air like a rocket, without wings.. I need do look more into how the fandom portrays her :3 hah~~
mhmm... :/c maybe they did so in order to smooth the races out as a whole? You see, in the mane 6, having both Surprise and Rainbow dash representing the pegasi would maybe portray the entire race as full of energy and all. Same thing would work for AJ and Posey... Switching it around, they can avoid some obvious patterns, like: Pegasi = energy and agility, Earth Ponies = nature and care, Unicorns = arts and knowledge. This way they can have some people identify themselves better with the mane 6 and their races. It wouldn't feel out of place to see a Pegasus OC that likes to stay on the ground and care for their family and friend, or a hyperactive ready-to-party earth pony.
Well, I see nothing wrong if they kept the original, as it would really be the most intuitive to me x3 but it probably balances it out a lot better switching it around like they did. Still... I'm just grasping at straws X3