Don't really matter to me but I don't see why so many people I talk to are against auto attack. As if spamming 11111111 is strategic or adds to the fun factor. I rather spend my time communicating with my party members and managing all my abilities and timers, instead of having to constantly manually use a normal attack.
If you're spamming 11111111 you're doing it wrong.
As I already said, you have at least 2 different normal attacks per class, plus several abilities that boost tp generation and lots of ws; usually i start the fight boosting myself, then 2 or 3 normal attacks (that are not always the same, it depends on the mobs, on the fact that i need TP or not and on my position), then a weapon skill (some times even 2 in a row) and this is only for easy guildleves. With NMs is totally different, i use abilities many more times, i use normal attacks battle regimens followed by weapon skills battle regimens and it isn't spammy at all, indeed there are several times when we need to stop attacking and gain tp only via abilities in order to avoid killing the NM before he's incapacitated.
I'm sorry but i really can't see where the battle system is spammy. Adding an auto attack feature would make impossible to use all the strategies i listed and THEN the battle system would be a slow spam of weapon skills