Quick update. Some of my SPS seem to be on the road to recovery. I am starting to get polyp extension and some coloration back. It's nice to see that after a month of no polyps and everything looking brown. I am sure there are several reasons that caused my SPS to react poorly to the upgrade but the main reason I have deduced has to be my sky-high salinity. It was sitting at 1.032 for a week before I realized how off it was.
Either way, I'll take my losses and work on growing some of those giant colonies back over with some new 1-2" frags down the road. I'll stick with my policy of not buying colonies for the tank and just grow small frags. I know my system was successful before so I just need to repeat it. It will actually be kind of nice to repeat the process again since it was so fun to see my little frags turn into colonies over the years instead of just having giant colonies already.
Maybe out of the misery of watching some of my SPS die, but I found a new appreciation for LPS/softies and my fish community. I very much enjoy watching my fish swimming around the tank and even look for the random inverts and other life forms I have added to my tank in place of my thriving SPS population. I added two sea urchins (orange and blue tuxedo), a pink and black sea cucumber, two cleaner shrimps, 5 emerald crabs, and a couple of rock anemones. Very interesting to observe their behavior within the tank confines.
I'll post some videos of the fish in a bit once they upload. Fun thing to observe is my once isolated 7th chromis has been welcomed back into the group. He was spurned for the last 6-7 months but maybe the extra room in the new tank calmed them all down a bit and they welcomed him back into the group.