This is a system with accidents just waiting to happen, I think they must return to the system with mechanics putting arms in the air to confirm the wheel has been changed, a hell of a lot safer it would seem, because the release guy I don’t think will check all mechanics are clear, they’ll see green lights and go... even if their job IS to check mechanics are clear of the car first.
Even that has resulted in plenty of Unsafe Releases over the years. The unfortunate fact is that F1 is literally a game of sub-second intervals and when pit stops are one of the only ways to execute a pass for position, the pressure is on the Chief Mechanic (the "Lolipop Guy") to release the car as quickly as possible so even when he's looking for raised arms, he triggers off any arm movement - assuming that a mechanic is raising their arms even if they are in fact not.
I enjoyed that and nonstop coverage! no commercials!!
Yes, that was a pleasant surprise for both qualifying and the race.