^The Falcon looked thin to me too for a sec but it may have been the angle.
I hope they make the grossguard work in the film. It does look like another lightsabre could simply lop off one of the mini-blades at the root.
Teal/orange, shaky camera and the "typical fantasy film environment circa 2014-2015"-forest are my other (minor) complaints. I like everything else. I disagree with the Falcon shot criticism above. I could really feel the g-forces at play and the subtle streams of air really add to the realism. It may feel a bit weightless for a moment but maybe the Falcon WAS effectively weightless at that moment (think weightlessness simulation with airplanes that rise up and dive to achieve zero gravity momentarily). A nice thrill-ride shot with no distractions. I think it will be awesome in a theatre and in context/with build-up.
The rolling R2 was a bit of a jaw-dropper but it makes sense, 30 years and all that. I'm pretty sure it has compartments that open.
It does seem that Boyega's character has crash landed his TIE, maybe after fighting the Falcon? I guess Ridley's character finds him.
I noticed there are zero shots of stuff happening in space. The trailer better have some starfields and space battles!