Not really. The Aquabiomics test showed that my tank was in the 44th percentile for diversity and the 87th percentile for balance. More importantly, it didn't show any known coral pathogens. So perhaps it was just a low-nutrient issue? A couple of the corals affected have died, while some others seem to have recovered somewhat. There has not been any further spread, so I suppose it's also possible that the bayer dip or cipro took care of something.
That said, the Aquabiomics test did show a couple of fish pathogens (photobacterium damselae and vibrio fortis). I lost one wrasse to a bacterial infection shortly after adding to the tank and successfully treated a clownfish with an infection a couple months later, so I may consider doing something about those at some point (assuming they may be the cause of the fish infections) - which would again probably put me down the path of a cipro treatment for the whole tank. For now I'm going to let things ride as all fish seem healthy and corals are doing okay.