A good review, thanks for posting it.
One bit however:
Using the Q code and camera profile gizmo is purely for convenience and security of getting the password typed in, and totally unnecessary. I've never used it.
To set up an iOS device with the Leica SL and pair it to a camera, just start WLAN to "Create a Host" mode and enabled it for "Remote control by app" when you turn WLAN on. On your iOS device, tap Settings > WiFi, and pick the "Leica SL-XXXXXX" host from the list. Type in the password (the twelve-digit numeric string on the camera's LCD), and you're done. When you start the Leica SL app, it will recognize the SL and let you connect to it. When you tell the SL to disconnect, it will shut down the network, and the iOS device will switch back to any other network it was connected to.
The iOS device will remember that host and security password automatically. In an area with known networks already operating, it will reconnect automatically if you start up the WLAN on the camera then go to Settings > WiFi first, connect, and start the Leica SL app. If you're in the field and there's no other WiFi networks around, just start it up and the iPad will connect immediately.
The Q code and certificates installation seems a bit fragile and, since it's only a convenience, it's best ignored. All that it's doing is installing a secure password certificate which should allow it to connect without having to type in the password.
G