First impressions are rarely good with Pokémon designs. Every time they experiment with styles and do something we're not used to, many of us are repulsed at first. Many Pokémon I like now, I would probably have really disliked the first time I saw the in a context like this. And the first time I saw the starters they looked absolutely ridiculous to me. But so did the gen V starters, and so did the IV ones.
Basically, it's a matter of gradually getting used to the design style. GF usually changes it between generations, which is why evolutions between generations often seem funky (obvious example would be the Rhyhorn-Rhydon-Rhyperior family). But in a year, Ninfia will probably look as natural to us as, say, Espeon does now.