I must admit I am some what ignorant of the exact proposal re the World U21 championship. However, if I've picked up at least a bit of the proposal i.e. a GP style leg in Argentina, I think this is a good idea.
It is after all a 'World' championship.
What of the U21 riders that are from South America, given the current set up of the final(s) being staged in Europe, surely they are on the back foot from the get go.
If there is a nation out there that are up and coming, in speedway terms, surely you do what you can to encourage that country. There may be a Maradona of speedway waiting to be unearthed.