I'm not saying in any way that it should be covered in depth.
Furthermore, I'd be against learning how to surface with an unconscious diver from depth. I said an unconscious diver at the surface, which is easier and simply knowing the way to "tow" someone without killing yourself in the process. And can be totally separate from good buddy skill. Your partner has an heart attack on surface. Well you can't just leave him there, but you can't kill yourself trying to save him.
Unconcious Diver : It's put the diver on back, inflate bc, fins while pulling from BC at chest level, your fins should go on side of diver, tow. Pretty simple.
Panicked diver. Approach diver from front, talk to him first, try approaching, if he tries to grab you push back, if he tries again GTFO. Pretty Simple, no?
It should be something taught at the end of the class, before certification. It takes 30-60min max.
Furthermore, why should a diver need to have a AOW to learn rescue? I find this absurd. Can't an OW diver learn rescue procedures? Will you use your compass (another thing taught in CMAS level 1) to rescue someone, of need to dive deep to rescue someone? I think not, i think it's only a way to make more $$$$$.