On the kick out - I can remember a lot of instances where refs blew for frees even though the ball had travelled 13 meters. Up to a few years ago, and Dublin's use of this, I don't think even the top refs knew this rule properly. Mainly they blew if the ball didn't cross the 20m line. You can still see it in crowds howling for a free because the ball hasn't gone beyond there.
But in general, if teams marked up the forwards man to man they wouldn't have a problem with this issue, the guy would still be marked. So they are looking at the wrong area to fix the problem - by changing this they would be rewarding teams for keeping defenders back.
Though I agree with changing rules to keep up with the changing game. But it should be done by a committee with an end view in site. Not done by hundreds at congress who can't all share the same vision. Look at the mark, it was tried, worked well but was rejected. Then suddenly it is in again. There is no logic because a committee of hundreds can't have a logic, nearly by definition.