1965 is always mentioned as a defining moment in the framework of league racing - and it was.
Would it work today I doubt it - not enough riders and vested interests (financial) way above what was then with rider control able to dictate team strengths rather than averages.
A ‘second’ division wasn’t established then so new riders only had second halves and open meetings to get experience. It took the second division to bring about the revival in the sport.
I recently attended the Eastbourne v Lakeside match at Iwade run with 6 man teams over 12 heats. Then 3 heats of bottom , middle and top scorer and made for an interesting match but with more scribbling of course!