Rugby's biggest problem has been correctly identified at least. The international game is so much bigger than the club game that the club game can't be financially viable across the board.
I don't know enough about SH to comment on that but the Top 14 works because it's an institution, many French fans would take a brennus over anything but a world cup. The URC is a great league format but not a big enough market to be a point of difference, the South Africans are in it out of necessity, it loses it's luster with less teams and the participating nations and the rest of Europe don't have the quality to replace them, most are happy still*. The prem is trying to tread water really.
Where Europe is failing is the European Cup. It's essentially turned into, at best, a two round tournament. Groups are a joke, the knockouts are low in quality in the r of 16 and quarter finals, the same teams seem to play each other year in year out.
The hierarchy in europe used to be:
Internationals
Heineken Cup / Top 14
Prem / Pro 14
It's now:
Internationals
Top 14
European semi finals and final
Prem / URC / Early European knockouts
European pool stages, they're the current equivalentof internationalbreaks in soccer, all the best players play but hardly anyone cares.
I hate everything about this breakaway, it's LIV golf minus the human rights. Taking the passion, pride and history out of sport has never worked. LIV golf's biggest star is Donald Trump Bryson Dechambeau and his youtube videos eclipse the sport in terms of viewers.
But rugby outside of France has left themselves vulnerable to this. I'll be against it if it happens and feel hard done by as a fan of a well run club that has always sought the best interests of European rugby. But equally, you can't feel sorry for the decision makers of the past 10 years. They let this happen and it's a consequence of the initial break up of the Heineken cup and every decision made in that tournament ever since to make it a secondary competition.
*Wales aside but they're primarily victims of their own failings.