Very nicely done. Since this is a FOWLR, maybe you could mix up a small batch of aragocrete to mold around those flat-cut pieces in the middle? Nature abhors a straight line, and you won't have coral growing in to cover that up. The aragocrete would color up in time to match the rock and would take away the visible sharp edges.
Still, you've done a beautiful job! I know what it's like to pour so much effort into something just to have people tell you that it should be done differently. Just a friendly suggestion. Keep up the good work.