Real-time battle system made things cumbersome to control.
It is ATB, just like the other Final Fantasies.
Inability to control more than one character at a time.
Umm, you could give commands to every character at one time.. You move every character, but there was no reason to move anyone except for the one you are controlling.
Useless weapons (Did anyone EVER use measures?).
What does this have to do with the battle system? This is an itemization issue, and it's not a big deal, because there is no character based restrictions on weapons. A flaw, yes, but not one appropriate to the discussion.
License Points blew.
Again, has nothing to do with the battle system.
Far too many spells/items were worthless without very specific set-ups.
Having different character builds is a bad thing? I think a lot of RPG fans are going to disagree on that stand. Which spells are you talking about particularly? Because buffs/debuffs were vastly more important in 12 than any other Final Fantasy. Again, I asked in comparison to the other Final Fantasies.
Polite conversation should never include Politics, Religion or what constitutes an RPG. Playing a game for it's story is like watching porn for it's story.