I'm going to preted Korra didn't get her bending back and the finale ended with her crying on the edge of the cliff.
Aaaah, now that would've been FUCKING SATISFYING ending and a crazy cliffhanger (no pun intended). When Amon took her bending I was all like "Holy shit. He took the Avatar's bending. No way. Can he do that? Is he allowed to do that?? You can't just take away the AVATAR's bending! Won't the Avatar spirit get super-pissed at him for messing with the balance like that?"
Soooo many questions and so much potential for an AMAZING unique spin-off! A potential spirit world journey, the need to travel around the world to re-connect with the elements from their sources (maybe pay the Sun Warriors/dragons a visit? Or talk to Yue? Or run into badger moles?), having to manage with just airbending (like Aang did) while re-learning the elements, etc etc!
~15 minutes later:
Korra: Boohoo.
Aang: Yo.
Korra: Aang! Sup.
Aang: Gratz on randomly unlocking airbending. That conveniently means you can talk to me now.
Korra: Cool.
Aang: I think you lost the rest your bending somewhere, here have it back.
Korra: Sweet, cheers bro.
Aang: And here's the ability to fully control the avatar state even though this is your first time connecting with the spiritual side...
Korra: Neat-o
Aang: Also here's the ability to energybend.
Korra: Awesome.
Aang: Oh and here's how you can use energybending to restore people who have lost their bending.
Korra: That easy huh?
Aang: Yup. Anything else wrong with the story?
Korra: Nope that's pretty much everything. The bad guys killed themselves.
*Aang ruffles Korra's hair*
Aang: Good. Try not to make too many oopsies okay? Otherwise I'll have to waste another 30 seconds of my spirit life to fix everything that was wrong with the plot in one shot (again). Run along now.
Korra: Sure thing bud *wink*
My brain: THE FUCK JUST HAPPENED