BLARGL, my post just got eaten by the internet. Time to type it up again.
What is the old power structure, anyway? Not too clear on that, and many types of power structure react poorly to bumping off the old head and trying to replace it.
The situation you describe... is foreign to human psychology. People instinctively want to move to the top of the social pecking order. Not everyone wants it all that badly, and not everyone who does decides that it means going for political power, but enough do that any government this weak would be toppled in short order. I mean, "Hey, guys, we totally rule this city now." "Yeah, sure, whatever." "Oh, and we're passing these laws. Go along with it." "Sure, why not?"? Their main power base is a weak and largely discredited military, and they have practically no legitimacy - if these were real people, someone would make a power grab within six months.
I can't think of any factions both strong enough to kick out the military, and that care enough to do it. While the populous/farmers/builders/woodcutters certainly have enough people to do it, they wouldn't have the inclination. Their isn't any religious faction that would try to sieze control, since they are basically hippies for the most part, and don't really have any priests/high priests. Their aren't any super rich people either. While i suppose the elders (as a group, not just the people who were in the council) could do it, most of them don't have the inclination (since they were never eligible for the council due to being too young).
While upward mobility is nice, for almost all of recorded human history, the only way that it was remotely possible to rise up within the world was in the military, and even that was extremely hard. While people like upward mobility its a relitively new concept. And if anything, its more possible to rise upward with a millitary control since in the old council, since with the council of 12, you could never really join the council if you weren't old enough to begin with, while with the military, you could join it with the intent of rising in the ranks and getting up to a position that you could command a new unit in the military when it forms.
They are still the military though, if you try to kick them out of power they *will* kill you.
But then, that's the rub - they aren't exactly human. They're close, regeneration aside, but who knows what kinds of psychological differences there are? I've been assuming they think pretty much like humans do, but is that not the case?
Pretty much like humans BUT, they are all for the "greater good". They imprisoned Feta and the Council because they think that they did a terrible job, and because they think that Feta betrayed them (yes, insane i know, but its what they think).
They don't really have a concept of money and only a small concept of ownership. Basically the council said what labor needed to be done, and people did it. Basically, its communism, but it works for them because they have a much stronger pack mentality then humans. If you work then you get food and a place to live. If you don't work, then you don't really get to live in the community. You get no food, and you become a social outcast, something that can easily be fixed by starting to work again. Obviously people who are unable to work for some reason and children are exempt.
Basically, people work in groups ranging from 80 to 120 strong, each one has a leader who picks what his group does for the season. The leader does all the relevant work making sure they get access to food, and that they are all there working. If someone is in a group that generally farms, and they would like to be a builder, then they just change groups.
As long as the Hinor believe that the military is actually acting in their best interests (and the military is trying to act in their best interests), then they will do what they tell them largely, because they think that they are doing what is best. While they might not believe what the military said about feta being a traitor, they still don't really care who is in charge, since they also have their best interests at heart.
Their are obvious exceptions to this, outliers as their are within any society and any species, but they are the vast minority.
For the most part, people don't own land or resources, they belong to the community (although its not like you will ever be kicked out of your house if you are working).
(Minor change, the military council will be comprised of 5+2L highest ranking members within each unit, so a level 1 unit will have 5 members, while a level 5 would have 11, it will also be named the senate).
EDIT: Guess they aren't actually ideal communists, since they still have a government, but they fall pretty close, mainly since their profit motive is much smaller, and they care more about others.