Interesting article.
Even without the potential CVC investment convincing the 6N's tournament to sign up was always going to be a big hurdle. The 6 nations on its own generates a lot of money (a much larger tv audience) so why should they change anything.. the Sanzar countries are trying to push the World league to drag the the commericial interest away from that, so they increase their revenue.
There will be a difference if CVC invests. Essentially they are like SISU. They don't care about rugby, they will want maximum return for minimum iinvestment.
That will mean the 6n's being taken off BBC/ITV and probably sold to Sky, it will also mean each union will receive 20-30% less income each year but the unions will be hoping that CVC can increase yearly income (from TV deals) to offset that. This mirrors exactly what is about to happen to the PRL/EPL.
CVC aren't investing for altruistic reasons.. they are money driven and they won't care about the consequences of their actions as long as they see a return on their investment
In 5 yrs we'll find out if the powers that be were being greedy and shortsighted or not