I don't understand the difference. I highly doubt Auto-Attack even does anything, but just more pointless animation. They are obviously going to balance the mobs so that you can't just engage a mob and let your character Auto-Attack it to death. In fact, I strongly believe that the current battle director, the same one that did FFXI, will make it harder like FFXI. Sure, he promised that there will still be solo gameplay, but he's probably talking about behest where you can join by yourself and be invited by others or doing a 1 star leve at the correct rank.