For rugby to be successful it does not need cheap, roughly thought out ideas like this. In fact I would go as far as to say it is harmful for the game as it dilutes the product.
Where we need to be is to focus on our two strongest games, and that is the full XV game and the sevens. The XV event does need improvements to prevent what was a shocking advert for the game with the recent lions series, however simple measures such as the referees applying the law as it is, and reducing the number of substitutions may go further to enhancing the game than any law variation we have seen over the last 2 decades. Equally the best way to grow the game globally is to support evolving nations. Allow them to retain players, develop competitive leagues, utilise each countries media and advertising to promote the product…and importantly, provide financial foundations to build upon (and that also goes for the grass roots from our own country).
If you want the fast food, party like atmosphere event then we already have this in the sevens. It is a wonderful product where of late, unfortunately, it has stagnated. This is a fantastic tournament, and if we can create competitive sevens leagues, starting with our own country, with teams having a specialist sevens team -not wider squad, academy and a smattering of first XV on a one off event as previous club sevens have been- but a dedicated sevens squad, to compete in multiple weekends starting from spring and into the summer, and importantly teams and nations putting full support behind this variation, then this is a far better option than Fissler is reporting on.
You do not need to reinvent the wheel, you just have to take proper care of those you already have. Do that and the car that is rugby union will be flying down the highway, rather than bouncing along as it is now.