Recently, with the last couple of english trailers from different games by Square-Enix, they all have actually been done in a amateurish way. I certainly remember Final Fantasy XIII's English Trailer being mediocre, but the voices in-game turned out to be better than expected. It was the same case for 358/2 Days now that I remember [after rewatching the trailer], so my post ages ago about this having mediocre dubbing was harsh, because Square-Enix just makes shitty English Trailers.
Heck, the best trailer Square-Enix made was "Deus Ex: Human Revolution". Far better than Birth by Sleep's trailer if I have to compare.