My view is that nothing has changed as far as the players are concerned, only the way we referee at post tackle/ ruck. To reward the first man there who has the ball 'in hand' (N.B. not just 'hands on'), as the second and subsequent players arrive to form the ruck, we will no longer insist on 'no hands' as the ruck begins to form. The first player and only the first player, then has the opportunity to play the ball with his hands but you must be certain who he is for if an opposition player gets there at the same time you risk penalising the wrong man. You may wish instead to decide that the ball has become unplayable at this point.
If the first man is successful in geting the ball off the ground then a maul has formed; you then call it and play it out, however, if the ball remains on the floor and you deem the first man has been unsuccessful in the nanosecond you have allowed him to do something positive with it, then I see no reason why you cannot then call 'ruck' and 'no hands'. He has had his bite of the cherry, he has had his chance and failed and it is your duty to ensure that a fair competition for the ball then follows. What you are not doing is penalising him in the first instance however when his chance has gone you can then insist that he releases the ball and call the ruck.
We seem to be in danger of breeding a culture of being afraid to call 'no hands' at the moment as being non PC and to players who ask you whether they can now handle in the ruck you say that nothing has changed as far as they are concerned. The only change is in the way that you referee it.