Goodness those are exquisite coral colonies. Your photography skills really impress. I'm looking forward to seeing how your tank adjusts to the MH. Lighting changes seem to cause reactions in corals, or at least I've noticed this anecdotally. I've recently reduced my LED intensity and am running T5s longer - which has led to a number of my Acros starting weird bulbous growth activity. I think it's good, but my Alk uptake has slowed, so I'm unsure if it's all positive.
You noticing any nutrient export changes?