England’s World Cup triumph last July ended an eight-year wait for a global trophy and came a year after the introduction of the KSL.
Asked whether that dramatic win over India at Lord’s could have happened without the domestic competition’s emergence, England’s Elwiss said: “We could have won it, but it would have been a lot harder.
“We’ve learnt a hell of a lot from the Kia Super League. I’ve learnt loads from the overseas players coming in, and seeing how they go about their business.
“But also it’s bridging a gap and it’s brought younger players through, who have performed on that stage and then performed for England, so it’s been instrumental in our success.”
England and Yorkshire Diamonds all-rounder Katherine Brunt added: “Including this new tournament a couple of years ago was a massive shift. The improvements in the standard are really showing.
“The skill-sets and the power of each team now is two, three or four times what it was.”