I think the sexualization of their relationship does the polar opposite of equalizing their relationship. Like any relationship between a mentor and child, it's not equalizing.
And Babs, of all people, would see that. And see it as wrong.
I strongly think sexual feelings for Bruce don't fit within the general father issues in the Batfamily. Strong feelings of love, obsessiveness and almost worship of Bruce do, for the whole Batfamily. It's sexist that Cass can't just have those feelings of obsession (like Tim) but instead has to have hers openly sexualized.
And if the beginning is about a father/daughter kiss, and I think it probably is, then it makes even less sense to change the story to one of romantic attraction between a father figure and daughter. WTF writer. That's really all over the place.
It makes me annoyed because the boys, and original!Babs get to admire Bruce and work to emulate him without being written as sexually attracted to him.
It's also a shame, because in my opinion two other elements of this story are things I like very much: she and Bruce fighting out their problems and her loyalty to his ideals over him as a person.
Speaking of which, that's another bizarre element to include if her relationship with Bruce is a crush. In that case, she shouldn't (story logic-wise) choose the Bat over Batman. This story is all over the place and doesn't make story sense. Still like the two bits I like, but the rest is... odd.