Dead characters coming back to life through illogical reasons - that's the ish i dont like. What in the world was the edo tensei so developed for if certain characters can come back to life by virtue of their chakra possessing people. Jeez, Orochimaru, here I thought you were intelligent! Anyway, Kaguya seems to be an awesome villain potentially, but darn it she should have had her own arc after Madara was defeated, with a proper introduction and forshadowing and not a few chapters worth of scary faces in the background (and random information dumps scattered here and there).
With that said, it was cool when Kaguya seemed to be talking about not wanting to fight ... then in the next panel she showed she's out for destruction. Otherwise, I don't know anymore. You could fit the Juubi inside some of these plot holes.