Well it is important to mention that some characters you loved from season one will not survive and their death's is pretty early in the season. Many people also do not like this season and I admit it is not my favourite but I do think that it is still a good one - story just change a little and we get new characters.
Song Kang's hair this season!!! Perfect, I love it. I love even more chemistry between him and Go MinSi, sorry I do not see any between her and soldier.
I do not thing that it is more brutal than previous season althougth this time there is a little nudity.