imaginarycircus

I'm actually divided. On the one hand, I rather think they did go back to Hogwarts for a year, completing their seventh year with Ginny's class. While they certainly have proven themselves, it's mostly with DADA. There's still a bunch of Transfiguration, Potions, and Charms to learn, especially if they want to be Aurors. Sure, they have a lot of guts and know a lot of DADA stuff, but there's a lot of advanced Tranfiguration/Charms/Potion and specialized Auror stuff (disguises, etc) that they don't know and that would be useful in their careers. I don't think it would be the Ministry/Hogwarts sending them back though--I think Hermione would force Harry and Ron to complete their education.

And yet, I also think they helped clean up the Ministry and route the non-Death Eater collaborators, like Umbridge. Perhaps they did go back to Hogwarts, did a lot of traveling to London to work on Ministry stuff. If so, I suspect that they'd be given quite a bit of leeway on following rules and getting assignments done, so long as they actually learned the work.

Regardless, people are very possibly writing the Hogwarts fic just because it's fun, and a known thing--and because it won't be trampled in a few years when the next book comes out. ;)