I’ve come to a partial decision. I’m going to use Feathered Square Block # 1 in the larger neutral areas. If you look closely you might see the “tail” in the top right corner. I’m going to rotate the block so that tail “leads”. It’s not exactly what I was visualizing, but I hope it will at least evoke in my mind what I was after. As for the rest of the quilt — who knows. I have 4 more of these to do before that decision needs to be made.