It wasn't even really a trailer, it was a TEASER. For what it was it did a fine job and I think you'd be crazy to judge the movie from a teaser-trailer. This star wars movies has a great director, a great writing team(the same writer who wrote The Empire Strikes Back and Return of the Jedi?!?! yes plz), great actors...I honestly have a ton of faith that it will be really good. Disney knows what they are doing, the marvel movies are a pretty good indication of that.That's why I don't think this new movie is going to work. It plays too much off nostalgic iconography with old characters, the Millennium Falcon, the Empire still being around for no reason now that the EU is gone etc.
I wanted to see something new in the Star Wars universe while still feeling like Star Wars (unlike the Star Trek movies which have nothing to do with the show but the names of the characters) but instead it looks like another money grab without a story to tell.