It's not complex or not definitely it's so linear story with flow essay to predict after 3rd episode. I don't understand where season 1 team go i am like most of the main lead fealt supporting or guest role. I can't even feel the team behind the camera had a vision of season 2 while directing season 1.
Except Jung Jin Young character who is add new i don't care any other new character mainly i really don't know them. Even in returning character side after first two episodes Song Kang & Lee Jin Wook character no where to seen as of Lee Jin Wook character I would say he is a guest role not even supporting.
Go Min Si character has a presence but most of the time i felt her reason are not so clear searching for who.There Many more characters I can't even remember except Park Gyu Young character had a role no spoilers.
Overall it's a good watch but I don't know where season 1 team went and instead of creating a new thing it felt more like holywood take of master invitation only thing it different from those came form season 1 . So yeah nothing different from those series.