I did OW a long time ago. Back then I looked at doing AOW but couldn't afford it. I did get the book, though. It looked to me then that AOW was a logical progression of OW, dealing with things people needed to know to dive, like navigation, but wouldn't have been able to get into in the much more basic OW course.
More recently, I actually took AOW. It was surprising to me that the program had completely changed. Pick your topics at random and do them, and ignore the rest. It's now like a collection of mini specialty courses, but you don't have to take ones that make you safer.
This new thing doesn't seem good to me. If people want to specialize, they can do so with a specialty course. But there's a lot of basic information OW leaves out, because it's busy teaching people to equalize and whatnot, and it seems like AOW should complete that basic training.
Rescue Diver was good. All three seem to me the foundation for being a prepared beginner.