I think this is the 3rd time I've watched a version of this trailer. I don't know why; I have never played any game of the series.
The English voice overs sound good in the trailer. Or as good as it can be given the Square Enix story and dialogue and the Japanese timings. I don't mind it, but other might.
Still don't know what to think of the trend of having promotional trailers that excise sound effects and only have voice overs and music. It works for Kingdom Hearts since the quality of the voice overs and music are great. It is still a bit weird, though.