Did anyone think, "they're already doing 'Rose's Turn,' at this point? If you're going to use an iconic number, shouldn't the context be persuasive and the stakes a bit higher? I agree with PalJoey, the scenes with the father are the high point. The song, cheaply shoehorned in, didn't serve the character or the moment. A waste, alas.
Sorry, to me that number belongs to Miss Jane Lynch. SHE is the Rose of the show, after all.
"I'm a comedian, but in my spare time, things bother me." Garry Shandling