Man don't hate on Korra. They did give us the best air bender mini story not talking about Korra but the 1st Avatar. Well it did get bad later. At least he got plenty of females to work with when we get to her book.
Wan's story was probably the second worst part of the TLOK, the worst is the second half of the last season. The whole propose of Wan's story was to retcon the entire lore of ATLA. The retcon pulled away from the Asian/Buddhism roots of the ATLA to a more Western/Star-Wars ones in Wan's mini story.
Which explains why the last season of TLOK was just a lazy parody of the original Star-Wars movies.
If you did not notice, TLOK was not made by the same creative team who made ATLA. While Mike and Bryan are behind TLOK, they did not hire the same talent from ATLA because of bad office politics. If you notice ATLA last season, the show was losing its story pace and was not as strong as the other seasons, which is why I believe the tension between Mike/Bryan and his writing staff happen around that time of development.