Lego, some little girls are highly romantic, in a very chaste way. When I was a little girl I had no access to Disney, I watched the same boy's cartoons my brothers watched, and I still wrapped myself up in old lace curtains and declared I was going to marry the 'Hansel Prince'. That's not Disney, that's the classic folktale archetype and as I've mentioned before marrying well was up until quite recently the only way for a girl to fulfill her potential. It still is in some cultures.
Also, the days of segregating films based on gender are pretty much gone, Disney are waking up to the fact that not only will little girls see their films, but so will their brothers, swaths of teenagers and young adults and even couples on date nights. Adapting the original Snow Queen fable would have been problematic because it's so female-heavy, it might have failed the reverse Bechdel test and the company wants to get more bums in seats.
Snatch, the My Little Pony franchise gets rebooted every couple of years. The ones you grew up with are Gen 1, they had Gen 2 in the nineties, Gen 3 in early 2000s and the current one is Gen 4. They all look quite different to each other because they all correspond to a different generation of girls.
The reason Gen 4 looks the way it does is because it's following the look of the cartoon, which is made with the Flash program and stylized to suit that format. The characters look the way they do because it's easier to animate that way, and the cartoon has the dubious honour of being a cartoon for little girls that's so good even grown men can watch and enjoy it. Check it out for a bit and see how you feel: