I agree with noxon that the trailer didn't fully represent the album, but it's nice to finally have some new snippets out there. I was listening to the trailer, and aside from the snippet from Dystopian Overture, none of them are even from the songs I've heard and have been getting excited about over the thread. It doesn't show all of the variety, or many of the vocal sections which make up the vast majority of the album. Don't judge the album negatively based on a few seconds out of a 2+ hour album! I can't remember the last time I liked snippets, because they're out of context and too brief.
I disagree with noxon that metal fans will hate the album, unless you want to stereotype metal fans as incredibly narrow. While the metal isn't predominant, there are still some great headbanging moments. Perhaps if the only DT albums you like are TOT and SC, you'll hate it.
But if you enjoy beautiful melodic music, I think you'll love it. If all you care about is weedly weedly or chugga chugga, maybe you'll be disappointed it doesn't have enough, but that's not the album's problem.
Concerning the visuals, keep in mind they have over 2 hours of music to fill with video to tell the story, which is a tall order for the time and money. This also isn't in the context it was designed and intended for, so it's not how it would be experienced live.