Jeez... it's practically impossible to critique something this perfect... at some point it will all comes down to the subjectivity of the viewers like if I were to complain, I would say I want the branch and the flowers to be less blurry so I can see more detail on it and how I don't prefer coloured eyelids. Or how I think there's a bit inconsistencies like how the whole thing is like a painting but some part of the lineart is too smooth.
Still, it's too subjective and my part of rambling is pretty much ignorable. Everything is perfectly composed and blended in harmony, The level of details is simply astonishing. One of my favourite part is definitely the ice.