Sorry to hear and see of your issues. LED are just such a different lighting source, your corals have been under MH for a long time. Unfortunately it's almost impossible to make all corals happy, with regard to lighting changes. I am confident that your tank will evolve again with different focal points. The Acropora and BTA seem to be adapting well. Did you do the lightening option yet with the lighting system? I love the ramp up and down feature.
Youre the best. I have learned alot from this light change. With due time, my coral will settle as they kinda already have. Lightening is cool, although I dont use if very often, mostly to show off to friends. The sunrise and sunset is fantastic. Really starting to love these hydras.