Already been proven that they can't actually determine when the ball is 'played' - think they used Sterling as an example, in that he could travel something like 1.5 metres whilst the ball is in contact with the passer's foot. Where would the line be drawn in that case ? Simply needs to be a thicker line and it'll be innstantly improved (not perfect, but better) - like what the Dutch have done.
No way they'll bin VAR now (I wish they would too - ****ing hate that pause after every goal now, it's crap) so got to find a way of making it work better. For offside, the forensic lines apply a level of precision that simply doesn't work
The rule used to be that the ball is in play only after it has travelled its circumference so in your example the offside point should be taken from after the ball has left Sterling's foot - not when his foot first comes into contact with the ball.
It was semantics then really. Never thought that this would be a discussion impacting on key aspects of the game.
The "entire circumference" rule is probably long gone now. It's difficult to keep up!
Any current qualified refs around to comment?