Realistically, what would have to happen is someone developing all the various rules and restrictions in a Google Doc and then having unofficially"enforced"rules, then it would require a groundswell of community support in order to get going. Look at how ADV 200 got its start for example, and thats still not even an official ladder as much as it is an unofficial thing that crops up from time to time.
The truth is that FRLG is an even less diverse version of ADV 200, as while it does have access to move tutors, you are trading in access to a number of key items that define ADV(such as Choice Band). You are totally welcome to try archiving the unique changes yourself and try to get others interested, by all means its a great thing when someone's passion inspires a new format, I just don't see the demand there though.