Whatevs. Despite the broad assumptions made in the Slate essay, I'm sure that every author — regardless of the age range s/he's writing for or the genre s/he's writing in — has a different technique and viewpoint and vision and experience and outlook.
Not everyone has to take pride in what s/he writes, and not everyone writing has to have strong knowledge of the market s/he is writing for. If some authors assume that there isn't any crossover between YA and "literary" fiction, then, heck: That's their loss.
Really, it just... looks like a slicker, updated version of the original. I recognized a ton of the dialogue and scenes, and obviously Ren's car and his adorable tie, so it looks like they recognized that they were working with a classic.
However. Bus explosions? And I do feel kind of weird about seeing Ren and Ariel, like, grinding. But maybe that's just because I'm old.