Noting too surprising here in terms of design...these look right in line with the pre-production samples that have been shown at shows over the last year.
Compared with the Spartan KoB models, I note the follow major differences:
-The ships are now much "busier" with detail.
-The proportions are a bit more squat (ie, shorter and wider).
-It's tough to tell from the pictures, but it looks to me like the overall size of the models has been increased. The Battleship seems like it's close to Dreadnought size, the cruisers look more in line with Spartan's battle cruisers, etc. This could just be an optical illusion brought on by the changes in proportions, though.
So, as expected, a pretty significant change in the overall looks of the fleet.