To be honest, I think auto-attack will be the downfall of this game's potential. I've hated aggro-indicators, and I have hated the addition of those NPC quests which server little to no purpose at all. But of the latter, I can live with those things, and I can understand why they are implemented. With auto-attack, I just can't see the reasoning in it much at all.
People have two different ideas on what tactics are
1. Stat-based
These kinds of strategies revolve around manipulating the stats of the opponent or one's self. For example, provoke increases one's enmity. Protect increases one's defense. These are all stat-based tactics. And people can use a myriad of combinations to bring down enemies focussing on minimasing the mobs damage and directing the mobs damage and also maximising attack and maximising defence.
Auto-attack works in this system because one spends his or her whole time changing the stats of the mob or the player in order for auto-attack to reach its full potential.
2. Action based
This system involves positioning (moving out of the way of attacks). This system involved blocking (blocking to increase defense). Attack is increased by putting one's self in the correct place, defence by blocking at the right time. Strategies in this system have less emphasis on stats and more emphasis on what people do and how they move.
Auto-attack doesn't work int his system because it defeats the purpose of combat decisions.
The reason I wanted to play FFXIV was because I was promised the latter of the two systems, not the former. I wonder how many other people will agree. And I wonder if SE has made the right choice.
In my opinion, SE should have eliminated such concepts as "provoke" and "protect" and instead made it so that tanks had to stand in front of the mob they were protecting their mages against. SE implemented collision detection but then never used it to their full advantage.
It's kind of disappointing and I wonder if they have utterly destroyed the game's potential, both in terms of enjoyment, and in terms of market potential.