"peaceful trance" might possibly be why. Personally I liked the Shakuhachi a lot but the overall song felt pretty constrained, at least compared a lot of your other works I've listened to. I'm bad with genres and this "constraint" might just be a trance thing but the song peaked pretty early and didn't do much out of the blue per-se. I think it's good, at least conceptually but very safe at the same time.
A lot of the links for the plugins are broken too unless those were just used while you were making the song (and not for the final product) xD