I really have to start calling this something else. As I work on it, I'm realizing that all my stitch and thread choices are about construction - the stitches are smaller and smaller and the color of the thread blends in with the fabric. All the big white lines of basting are slowing being removed.
The shapes, color and placement of all the elements are what matters here - I could be gluing them on, or painting them on for that matter, but I am staying with stitching for my own satisfaction.
The pace slows me down, forces me to consider and reconsider and, if something is not right, it's not a huge pain to clip the thread on the backside and snatch it out so the wayward scrap can be relocated or replaced. Slow going on purpose.