I like how Crystal fixed one of the errors in the manga. Mako and Rei didn't know that Chibiusa was Usagi's daughter, so they give those lines to Usagi. Someone complained that Crystal stole their moment, but I honestly liked this change in Crystal, it seemed more character development for Usagi, and it didn't really give much character development to Mako and Rei.
Plus the silver crystal was animated beautifully, and so was Black Lady. I don't really mind the long transformation scene, since the similiar thing happened in episode 11, mostly because it was the last time they transformed in that arc.
Also I kinda appreciate Black Lady's sass.