I do not think the format is the problem. The problem is the quality of the individual games, which is a function of the quality of the players.
That is why I made the suggestion I did, which has been widely ignored. Open the gates, allow players from within the competition's boundaries to play for any team and still retain their eligibility to represent their country.
By definition that would tend to even out the quality, to some extent, anyway.
What would effect would it have on, say, the Waratahs' support if Brodie Retallick turned out in their team next year?