Would you like to share some of your tracking settings as it might be of interest to try them. You have many great shots on Flickr.
I appreciate it, but honestly, I find only marginal differences in the AF Cases. I find that being able to anticipate what the system is going to do is the most beneficial factor to getting shots. That said, I do generally, use the "Locked on" settings or whatever settings that work to slow the release of the tracked subject. For the Accel/Decel setting, I generally leave in the middle, (0). I mainly shoot Eye AF using the Auto mode on the R5/R6. For the R3/R7, I really liked the custom sized zone with subject tracking enabled. On both systems, I used a second AF button with single point enabled, for a last resort option when the tracking fails.
If I'm not mistaken, it's a fairly vanilla or common setup.