Subtle changes. There was a 3" gap behind the rock formation on the right side. I decided to discontinue planting anything behind it so I moved the rocks back along the rear pane. This gave me some real estate in the front (which was quickly filled in with trimmings). I also removed plants and substrate along the front 2". I don't like it when plants crowd the front pane. Also did another H2O2 treatment on the rocks. Not so sure about the angle of the rocks on the right side.
Here is a before/after shot: