Indeed, pushback should be a simple as possible. Ground crews are of differing qualities in intelligence and english.
I could say the same about some pilots I've met over the years.
It is mandatory that there are coloured nav lights; even though you can not see them on the ground at night at any major airport, or with great difficulty, in all the other light pollution;
It is blatently obvious when Nav lights are on. They stand out a mile regardless of lighting conditions. It was always deemed best practice to switch the Nav lights on when the a/c is powered electrically when I was going through my early years training. This best practice seems to be dieing out unfortunately.
So why not a 'brake released' light on the nose gear of all commercial aeroplanes?
I'm stuggling to think of one that doesn't.
B777, B787, A320, A330/340 A350 all have them.
As does the B747