Ignoring all the details of the law.... (i.e. not looking at wording or specifics)
If after a tackle, a jackler gets his hands on the ball (by this I mean on the side or underneath so that they can actually pick it up if allowed), I am happy. BUT if all they do then it prevent the ball from being played, I'm not a happy bunny - or if they just put a hand on top of the ball (and push down?). By this I mean if they make NO effort to steal the ball. Personally I am fed up with seeing too many players try to win a PK by "trying" to lift a ball, while deliberately holding the players leg as well, or holding the ball and not trying to lift (in both cases aiming at a holding on PK).
As a jackler - you get there legally, and try and win the ball, I'm fully supporting your rights. But if you get there and only intend to hold it in, or try and win a "fake" PK, then I'm less likely to see it your way.
And a player with hands on - will be closely watching to see if they go to ground, then I want the release....
And if a player rucks the ball, and hands are in the way, I'm happy, as players are allowed to ruck the ball. If I think they deliberately aim for the hands though, it is a different issue.