For what it's worth.
1. I never pull the steering pin out until I've been given clearance to disconnect the headset. It's a last line of defence that any distracted flt crew will see the memo. In thirty odd years doing headsets I've only been asked once to remove the pin before the headset disconnect.
2. SOP. The tug will pull forward and slightly to one side but will remain on the taxiway in clear view of the flt crew until the headset is disconnected and only then will the tug move clear.
3. Only when the tug and all personal are clear do I show the pin and give a thumbs up. I stay there until I get a response from the pilot.
One other thing. The A320 headset socket is under a panel IN FRONT of the nose gear. Did the panel get closed? Brave lad to go anywhere in front of a moving aircraft, never mind that close to the nose wheels.