Fair

FWIW I’m in agreement - for me something needs to change as I don’t think the above should be offside, no matter how technically offside it is. As you say it’s about creating an unfair advantage, which there isn’t in the above for me (and I realise the then issue of subjectivity, but then that’s where centre of gravity would be interesting).

What happens if a player was leaning back with their foot stretched forward to control the ball?