It didn't look any worse than most new CGI-heavy movies these days. The worst part about the trailer (aside from that stupid-looking lightsaber...) was that it's just a collection of images with seemingly no purpose other than to tell us 'Hey, it's STAR WARS!' No indication of plot or characters. Very much a teaser, but at this point, that's about all we should expect.
Other than that, I thought it was good. Better than the Jurassic World trailer/teaser at least.