OH. The one thing that sold me on this more than anything else?
COMPETENT. VILLAINS.
Most of the antagonists in this story spend -very- little time holding the idiot ball, and Catra - oh, Catra! - shows sparks of genuine strategic competence bordering on genius, and is only really defeated by reginulae-ex-machina.
In Xanadu did Kubla Khan
A stately pleasure-dome decree
Where Alph, the sacred river, ran
Through caverns measureless to man
Down to a sunless sea