Good Question. The TDG does look like one-party rule in some ways. I will try to address your concerns.

Unlike communism, every citizen (of a certain age) will have the right to vote in the TDG. And every citizen will be eligible to be voted for. There is no working one's way through a party apparatus to get a name on a ballot. If aspirant has not earned the respect and trust of his/her neighbors, that person will not advance in the TDG.

Political parties often come with a platform of some kind, and those aspiring for public office have to tow that line. The TDG needs to do away with that because there is no 'olgy or 'ism that can solve problems for society. My article below gives a glimpse of this new approach:

https://medium.com/tiered-democratic-governance/daveology-b71cf3b3bed4

Other than four salient features, I leave many details to be designed by the early TDG builders. So the decision for the TDG to be a federated vs unitary state is kind of out of my hands. I am hoping for unitary state so that responsibliity and authority can be adjusted up or down as societies are always changing. Even if the TDG goes in this way, I kind of doubt the American TDG will have its highest tier in Washington DC deciding which potholes to fix in Eugene Oregon. A unitary TDG will find a better balance between centralized and local control.

If you have any more concerns, let me know.