wowa
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It's elementary... double elimination, one game with one set of rules/version, another with different rules.
If the score is 1:1, then you can vary things - but there's still a long way to go, so there's no need to delve into the details yet.
And why create more entities? Everyone would play on the "Lite" version and not worry - it's definitely better than one person mastering a new gameplay while others are stuck with the old one.
"...the personal strengths and weaknesses of a leader are no true indication of the merits of his cause"
(с) Roger Zelazny
(с) Roger Zelazny