While I totally agree with you on the audio(totally wish I could see the trailer straight from the site), I believe you are contradicting yourself on the definition of a trailer. A trailer is exactly what you said (see first line on second paragraph
here). And anyway for tv shows usually most of the clips they get are from the first episode, so you can't really expect that much from it other than the visual quality and animation.
With that aside, I'm getting paranoid trying to get the raws of the shows I want to watch today. Man if only I had something to keep me occupied for the time being.