@ Krakatoa: As mentioned in the text of the first post and by TJ below, the Spruance class had 4 gas turbines where 3 would have been enough to reach the required speed. to be able to sail 30+ knots on 3 gas turbines only gave her an slightly longer, narrow hull then would otherwise be needed, so the 4th gas turbine quite overpowered this efficient hull. This suggests first of all one answer: if they were slower, they were still fast enough.
The increase in weight was not that much on most of the designs. The Santa Fe above for example was about 9000tons, so only 200 tons heavier then the regular spruance. I think in her case this will cost her a little acceleration, but speed will hardly be affected.
the DGV and Ghiradella designs are actually lengthened spruance hulls, and since top speed comes closer to the hull speed the ships would in theory have the capability to be even faster. most likely this speed remains about the same due to more friction on the larger wet surface.
All in all, I think they would indeed react similar to the ticonderoga and the USS Thorn AGS conversion proposals, both listed as '30+ knots ships' still.
@ Hood : the reason I kept these grey is for the simple reason that I have no idea what paintjob these aircraft would get
if you or somebody else could advise me on that, I'd gladly modify it
(it might even be that the colour is ok, as on the seahawks, and it is just some markings on the aircraft that are missing)