Proximity was the issue when it was if the ball hits your hand in the penalty area, it was a penalty.
They then watered it down with hand to ball, ball to hand & proximity.
Those have been replaced by unnatural position, proximity & hand to ball. It's still open to interpretation & as it stand I'm fucked if I know what the rule is THIS WEEK, as it'll probably be different to what it was last week.
I've no idea how the football authorities intend to resolve this to the satisfaction of the majority...