The Fleet Dreadnought is coming! Just still not sure when exactly. The Dreadnought has had a fleet skin since February IIRC, so it's release is pretty much inevitable... eventually. Right now I wouldn't expect it's release until after the launch of Legacy of Romulus.
the reason it did not come out was of the built in ability same as the excelsior well the excelsior came out for 1 more fleet modual to compensate for it's ability so the dread will probably be the same 5 or 1 if you have the c-store version
last i read they where waiting for the saucer sep to work even though the saucer sep is in the ship modle. if you clip through one use can see where the battle section starts and the front of the shot gun lance