Great update! I miss the lunar cycles, that is a great feature. Sorry about the jawfish, I know that was one fish you really wanted.
Things look great with the coral and macros! The palys definitely don't need to be fed. Have you tried feeding the gorg though? I think higher flow was a great idea for it. If you have some filter feeder food, that will help too. I have a huge container of filter feeder food if you want some.
I have the same stuff in one area of my sandbed, kinda like diatoms. My conch does a good job of eating it, do you have one?