Re: the latest Geeknights episode and soccer rule changes...
Heading the ball is dangerous, but it leads to dramatic goals. So in this case, I think if headers are banned in general play, they should be allowed within the penalty box for shots on goal, or towards goal. Also for dramatic saves.
In the outfield, a long ball or high ball is often controlled or redirected with a header. In these cases uncontested balls should be stopped on the chest or foot. At the very least, if the ball is allowed to bounce first, it would take away a lot of the hard impact.
So the rule could be something like "No heading the ball without it bouncing at least once between its last contact with another player, except inside a penalty box for the purpose of a shot at the goal or to clear a shot at goal."