All proposals for other state structures are useless.
I believe the only way to find a better system of governance, be it state or otherwise, is to give everyone the right to secession from the current state. By that I mean either moving out into the wilderness and being free from state rule, but also not having any benefits from the taxes of others, or for an entire town or people within a large area to secede.
This was if there is a better way of doing things some people will try it and if they fail nobody will try to follow. If it is successful, more will follow until the current state can no longer maintain itself.