Yep, watch the trailers as well. Quite nice indeed, but I also liked the ones from the first three seasons. I'm not entirely sure, but I remember seeing one trailer from an episode of the first two seasons where the glow of the warp nacelles was yellow and not blue. I might be mistaking though.
And I agree with you about the bonus features. Writing staff was interesting for one season, but I am really much more interested in the production of the actual episodes. Shame they did not have a moderator for the creative team reunion. I was really looking forward to that VAM. But I guess they are just running out of money to produce more interesting features.