More concept art just got leaked. More spaceships. Said to be V-Wings, C-Wings, U-Wings, and an alternate X-Wing.
http://indierevolver.com/2015/10/18/ir-exclusive-some-early-looks-at-concept-art-of-the-ships-of-star-wars-the-force-awakens/
All the new ships appear to have astromechs. Again a return to nostalgia rather than going forward with the astromech-less designs of the A-Wing and B-Wing from Return of the Jedi.