A well timed soul crush catches the dive kick in the air. If within range, high or low makes no difference since you can't air block. At the very least she works for me as a Black Adam counter. At the very least Chris G, who play tested the game, seems to agree.
Doesn't mean BA can't do crazy damage like you said, after exploiting her lack of AA. But really, play the match up before you dismiss it. This isn't theory crafting, it's just relating experience. Maybe offline is different, but online, the leader board BA's have each fallen to Raven as a counter pick. Sure they're not the best, but they ARE within the top 20 so it's better practice than against the AI.