Okay, that's what I thought the general opinion would be, as it mirrors my own. I too prefer the smaller saucer. As I mentioned earlier on, the larger size comes from a re-calculation of the size of the Niagara-class saucer section by Ex Astris Scientia, which pushed the Niagara's size from 480m long to 565m long.
Starforce, the sizes for my two ship versions are...
OriginalLength: 375m
Beam: 310m
Height: 76.5m
RescaledLength: 392.3m
Beam: 364.5m
Height: 84.4m
FW, that is how I have her in my own shiplist for comparison: the original is the CL, the new version is the CL+. However, that was just for comparison screenshots. The (fairly) established length for the Niagara is 480m, not 565m, so since it's all conjectural anyway, I'm sticking with the smaller saucer for a far more balanced-looking ship. In actual practice, refitting a ship with a saucer that is exactly the same shape and just 18% bigger in all dimensions strikes me as a little silly.