I don't think overfeeding is a bad thing. At one time I was feeding twice a day. That was back in the golden days where Indo Lord polyps were selling for 50.00-100.00 per polyp. I did notice that when I was feeding them twice a day, they would throw up the food more often. Or maybe they do this every time. It seemed like after 4-6 hours I would feed again, and some of the polyps were spitting out food from earlier in the day. I figured I was over feeding them, and slowed it down to just once a day.
I've noticed good growth on both Acanthastrea and Micromussa, but Micro's don't need to be fed to get good growth, while my Lords needed to be fed to get good growth. Once I stopped feeding, the lord's growth slowed down.
My Japanese lords I got from Berlin Method grew very poorly, with only one morph(micro) growing into a colony. We'll see how the Aussie Lords grow, but I have a feeling it's going to be better than the Japanese morphs. I can tell ust by the way they heal after being cut and completing half polyps, that they are going to do well.