Yuu Watase's drawing has improved and changed tremendously, so are her story plots.
The story contains romantic/bitter sweet love, action and tragedy. Even FY had tragedy... Well, I find the Fushigi Yuugi's love plot very creepy. This story is just way better, the love story is not creepy and stupid. Yuu Watase's plot style also has changed tremendously (now compared to 1990's). But I still hate the fact that she makes so many of her characters die.
However, after FYGK hiatus, I must say that her drawing has again changed tremendously. I'd say that the guys are still handsome, but 'uglier' than before. Moreover, the inside manga columns fit "shounen" genre art, not shoujo. This is because she took way too long pause of "2 years" of hiatus for this story. I really wish her old art was back. This new art in late FYGK is very unpleasant to the eye. She should have put Arata or Sakura Gari on hiatus instead of FYGK.
I really think it's unfair for Takiko, while Miaka (stupid girl) gets all the happiness in the end.
My opinion (may contain spoilers):
Because FY was written before this story, a part of FY Genbu was also described in FY; because Takiko's father's diary was found. Basically, it has stated that FY Genbu would have a tragic ending. And I know Yuu Watase can't change that. All I have to do is accept this (future) tragic ending TT_TT (This is sad... FY Genbu is much more fun and romantic than FY)
In Fushigi Yuugi, it is said that the Genbu no Miko is devoured by the beast, but before she's devoured completely, the father kills her, then himself. Truth to tell, I would prefer Miaka to be devoured rather than Takiko. In FY, it's also stated that if the Miko's will is strong, she wouldn't be devoured. Takiko's will is so strong! How can she be devoured? I guess the Phoenix God was just being merciful toward Miaka, but the Turtle (Genbu) God wasn't as merciful.