The biggest knock I have on The Legend of Korra so far is the fact that Books 1 and 2 are not connected. For some reason, Nickelodeon Studios decided to green-light 12 episodes of The Legend of Korra, then order 14 more episodes after the first Book proved to be successful. This forced Mike and Bryan to develop the Books separately, causing each one to essentially be stand-alone.
Book 1 of The Legend of Korra covered the story of the Anti-Bending Revolution, while Book 2 is expected to cover an unspecified plot dealing with Spirits.
If Nickelodeon Executives allowed Mike and Bryan to work with 2 Books in the first place (like they should have), Books 1 and 2 would’ve most likely been connected. This would have made Book 1 feel less crammed since many of its plot elements would have been carried over into the next Book.
But even though Nickelodeon undoubtedly made a big mistake by ordering these Books separately, they seemed to have redeemed themselves when they ordered Book 3 and 4 together.
Mike and Bryan wrote Books 1 and 2 as solo Books because they could never assume that they’d get the opportunity to continue a single plot throughout several Books. Now that Nickelodeon finally decided to give them 2 Books to work on at once, Mike and Bryan will have the opportunity to create a plot that covers two Books rather than one.
This opens up a lot of new opportunities for Mike and Bryan simply because they’ll have full creative freedom when it comes to writing the last 2 Books.
Giving Mike and Bryan more creative freedom during the course of Books 3 and 4 will undoubtedly make expectations high. But past history has shown that expectations generally tend to be broken.