I'm going to assume the animation is still very unfinished at the moment , like most teasers for anything. Notice how few real shots there are, and how basic they look. It's not coming out till fall so they have some time. Plus they only had animatics in the character videos, so I'm kinda surprised they'd try to make teasers yet.

And, I think the marketing is just doing a crap job. The final arc of season 5 of Clone Wars was enough to have me put my full faith in this, till I'm proved otherwise. Both the physical quality (story, acting, facial animation) and aesthetic quality (animation, rendering, music) were on par with Pixar films, IMO.