IMO the law needs to be changed back to how it was, i.e. that if the ball hits your arm and there's **** all you can do about it, it is not handball.
The laws since the beginning of the game 100+ years ago were founded on the principle that you can control the ball with your feet, head, shoulders, arse, whatever... but not your hands.
If you haven't used you hands/arms to control the ball, then I think that should be fine.
After this season is finished they should change the law to something more common sense but bot before IMO.
Just have VAR show the evidence of the ball touching the arm. And use this disallowed goal as the baseline to judge everything else against.
I don't want to see Liverpool for example benefiting from a change in the law or it's interpretation because they got it wrong in our case which cost us 2 points. Let them also suffer the same faith and perhaps the same points loss.