Thanks for this well explained video, I've just subscribed. One useful setting you omitted, which I've only seen on one other video, is the 'Detail Set' option available with 'Metering and AF Start'. This lets you choose which AF operation and method to have preselected when you press the AF-On button. I have this set to one shot and smallest point, so that it functions like the traditional half shutter button press.
I guess it is disabled because the Sutter button was reconfigured for back autofocus button, one can not operate pressing back button and joystick at the same time anyways