The problem with the current system is the need for TP to use other abilities. If all those abilities were available from the start and placed on a cool down there wouldn't be need for an auto attack.

But currently you play dance dance revolution with this battle system and you know what. IT IS NOT FUN FOR ME! and it's not fun for many other people.

And for those of you thinking that all you will do is watch the battle progress while you do nothing else....GET A CLUE! you will have input on other aspects for the battle, you just let your auto attacks take place of your TP gaining abilities. You have control of everything else.