In my opinion, this isn't the worst script from GMMTV, but I would make some changes. The main couple should have taken longer to get together. They could have included some ethical issues about the difficulty of a hunter staying with his prey, i.e., the vampire. It could have taken a little longer for Prem's character to reveal himself as a hunter, and there could have been more scenes with the supporting characters, the hunters.
Unpopular opinion: not the biggest fan of the ML. Man's aggressively nosy, oscillates between "y u no marry…
The way he acts is suspicious, as if he were acting in his own interest. It's hard to believe that he is so flustered and irritable just because he is worried about his cousin and a marriage of convenience, which was common in the past, especially in important traditional families in the city.
Funny, I don't usually watch GL, but I went to check out Only You by the duo LingOrm super boring, I even dropped it because I was expecting action and all I got was empty talk. And it was exactly a storyline like Wicked Game that I wanted in that GL Only You.