Here we go again, another great report!
I guess it's mostly too late since a lot of your flights are done, but I have always preferred A17 out of the ATL clubs because its large, it retains the older look, and the staff (at least at the bar), are typically quite good. The new F concourse lounge is also decent, and E would probably be my next favorite. The C lounge is small but retains the older look, which I prefer. Agreed though that the B lounge is TINY and not good.
You could always just go to One Flew South in E for a decent meal!
Safe travels.