Hard to say, but one problem I see is that strong regional identity that powers the political processes in federations cannot be created by fiat. If you turn a centralized country to federation by passing such law it would continue to work as a centralized country. Maybe in 100-200 years regional identity, regional elites, specific regional interests would emerge, but it won’t be tomorrow. Same, although maybe in a lesser extent, I think, applies to already federated countries and “making them even more federated”.
Hard to say, but one problem I see is that strong regional identity that powers the political processes in federations cannot be created by fiat. If you turn a centralized country to federation by passing such law it would continue to work as a centralized country. Maybe in 100-200 years regional identity, regional elites, specific regional interests would emerge, but it won’t be tomorrow. Same, although maybe in a lesser extent, I think, applies to already federated countries and “making them even more federated”.