Everyone needs to lower their expectations. Not just for the game, but also for the possible DLC. Some people had unrealistic expectations for the Day One Patch, and now they're doing the same for the possible DLC. Just be conservative and accept what's to come, especially on the innevitable KH4.
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With that said, I liked the Anti-Aqua fight, and something tells me that Anti-Aqua could have been Vanitas overriding Aqua's heart with darkness, like sorta what Master Xehanort did with Ventus and Van, but inside Aqua's body/heart.
Also, her battle theme doesn't feel like Fate of the Unknown, and more like TAV's trio theme.