I really do NOT believe having auto-attack fixes anything in FF14. All it allows is for people to go afk while they are fighting Blue dotted enemies. But there is nothing really impressive about have 2 options to build TP either. HMMM... do I used heavy stab or Light stab. WELL, heavy stab doesn't do any more damage than light stab and cost almost double the stamina. HMMM.... I think i'll use light stab.
Essentially, what needs to be done is every class needs more attacks that build TP, or they need directed attacks, attacks such as an attack at the arms to disarm a weapon Weilding enemy for 5-10 seconds, or a skull hit, to addle an enemy and make them forget the words to their spells for 3 seconds, etc. As you can see, these attacks can't be used against every mob, example: a disarm attack would be worthless on a marmot. But they would give you variety on attacks you could use to build TP. So maybe on an imp or something, it would be worth spending 2 times more stamina to do the skull bash, instead of just doing light stab all the time to build up the TP.
But honestly.... I don't support Auto-attack and it shouldn't be implemented, it just for people who want to get a soda while they are in the middle of battle.... ridiculous.