I would start by saying that Alchemy of Souls season 2 has the same elements as season 1. If you liked the first season, you will like this in the second:
- the humour
- the photography
- the acting (better than in the first season)
- the environment, the setting
- the epic scenes (less but better than in season 1)
- the friendships, romances and arguments

I honestly think that the people who left bad reviews just didn't understand the story.
Two souls confront each other in the same body, one of which is better than the other (hence the fact that it's not the naksu we were introduced to in season 1, she can't be entirely herself). And you seem to have forgotten at the end of season 1, how tender she was with her husband.

Also, I've read that some people find this season "mysoginous" which is absolutely not true!
I think you forgot all the female characters who play a CRUCIAL ROLE in the story :
- Kim Do Ju: She has the most impact on Jang Uk's decisions. Without her, he would never have made so many good decisions.
- So Yi: She is really bad-ass. Luckily she is there to give real information!!!!! Without her, there was no sequel after episode 5.
- Naksu: I won't say more for spoilers but without her, the world would fall apart.
- Jin Bu Yeon: main character, one of the most powerful. Same as Naksu, without her the world will end.
- Jin Ho Kyung: Charismatic character that everyone fears. I won't develop more for fear of spoilers.
..so please, there is no point in using such words

My feeling about this season:

I lost hours of sleep again because I love this show. The story and setting are gripping. Still as good as the first season.
Not to mention the acting is really better than the first season.
Let the story carry you along, it's great.

Only negative element:
Yes, there are a couple of inconsistencies, but frankly, it's not a big deal.