I think if there is quite a bit of disillusioned feedbacks it's because people had high expectations for the match…
I just started this and I can guess some people will be disappointed by it. CY is a pro but it feels like the rest of the production doesn't match. But this drama works as a fun Wuxia romp without too much angst so anyone that didn't have high expectations will be okay with it.
CFY is perfect for this role. The brashness of youth, the arrogance, and simmering resentment at his life. He's so young here but doing well for his first role.