Here is a diagram showing my personal settings for the X52 Joystick. I use this setup primarily when flying small GA aircraft and keep tinkering to find more useful bindings. As far as the X52 Throttle, I am open to suggestions for button assignments.
Good lay out, in mine, I setup the trims for elevator and aileron on the Throttle unit, and several buttons for toggle drone, slew mode, tail wheel lock for draggers, deploying the water rudder, cockpit quick views, etc. I use this controller in an alternate machine for testing, my main pc is installed with the Alpha yoke , Saitek panels, and Xbox controller. I like your drawing, what did you use to generate it?