Terrific feedback, thank you all. I notice the common thread in these recommendations is scales. Admittedly, I neglected scales for years. I shortcutted a lot of fundamentals earlier on. I put the guitar down for years after hitting a ceiling.
I picked it back up seriously recently, and am having a blast breaking old habits and enjoying the results. Those results shed extra light on the coordination/synchronization problem.
Thank you again for taking the time to lend your thoughts. This was my first post, and I’ll bring more as I continue my dive back in.