I cannot express how highly I recommend this show! The story is unique and draws you further and further in with each episode. Even though the pacing is a little jarring with the transition between the first episodes and the rest of the season, it more than makes up for it with it's beautiful animation. The characters are expressive and lively with such smooth animation that I couldn't take my eyes away. I rewatched several scenes because I was so mesmerized by the animation. There are wonderfully animated actions scenes throughout and the music is perfectly matched to heighten the experience. So much of this show is gorgeous.
As far as it being a BL, I actually didn't get that feeling about it until after looking more into the source material. It is definitely subtle, but it builds over time. It's easier to see it when you're looking for it. I dived into the show blindly and even showed it to my boyfriend who doesn't like BL, but really enjoys this one. It's really a show that everyone should give a try at.
The only barrier is that if you're not familiar with the source material or donghua, the elements of the world and sects can get a bit confusing, but it falls into place after a bit. I definitely recommend diving into the novel or manhua (Chinese comic) if you enjoy the donghua.
P.S. - The studio has all the episodes of this season and the next on YT!