My wife and I were on the Dream (out of Port Canaveral) for a 3 night cruise on Sept. 24-27. We are 50-year old life long Disney fans and this was our 10th cruise (just as a frame of reference).
The ship had a little more than 1,000 guests of which 200 were children (I think it tops out around 4,000). We were tested for C19 in the parking garage and got our results in about 50 minutes.
It was a terrific cruise. No lines, no crowds, and the usual service. I would highly recommend taking a cruise now for these reasons.
I can see why some may say that the ship doesn't have the same energy with lower passenger census numbers. However, for us, that energy can sometimes manifest itself as huge amounts of noise (and chaos at times).