hum you really like making the daimyo seem like a all powerful character that has real strength behind him instead of the figure head that he really is
when seeing as this is post war naruto no one really has anything close to naruto "personal power" evidenced by him being a "super"(and i mean really super) chakra powerhouse(sasuke doesn't come even close, all he has is eye chakra tricks)
and political since to the whole fucking world he's a fucking hero
sasuke is indeed someone that despite helping to end the conflict is someone that was just there because the whole story revolved about naruto getting his "friend" back, if he was anything close to a true shinobi instead of the shonen version he would have moved on and find methods to deal with same problem without having to rely on someone that is on par with kabuto(and that is saying something) when it comes to switching sides
p.s. let's be serious here the only samurai of skill and power are the ones from Iron country, a neutral place that i guess allows their samurai to choose a master(daimyos) to serve as guards
shinobi villages are isolated because that's the whole point and not because they lack the power to take a country by themselves
and then are the army killers, yeah sorry but no army of samurai or shinobi could fight someone like the true powerhouses (madara,hashirama,gaara,naruto)of the shinobi world
so yeah the shinobi villages have a symbiotic realtionship with the daimyo because it benefits them to have it and not because they lack power
Author's response
First, lets just be clear. In the manga there is very little explanation to the point of the Daimyo. So honestly, I don't see the point of this review. To prove what, that Kishimoto didn't think his story through. I on the other hand try to bring a sense of reality to my stories, and there would be no point to following the Daimyo if as you point out he was just a figurehead. Take the British monarchy for example. They are a true figurehead, with the real power being in the Parliament and the Prime Minister. But the Monarchy was forced into the situation, they saw what was happening to the other ones and so when change reached the shores of Britain quickly agreed so as to keep their wealth. Yet, what explanation is there as to why the shinobi would follow the Daimyo in canon Naruto. Absolutely none, so again I really can't understand why my providing the idea that the Daimyo are actual forces to be considered is something you don't seem to comprehend. Otherwise they truly serve no purpose.
Secondly, the villages are not isolated, since everyone and their mother knows exactly where they are. Not exactly seeing your point here. How exactly do the Villages have a symbiotic relationship if the power rests solely on one side of the equation. If anything it would be a parasitic one in the case you present because the Shinobi get all the benefits, while the Daimyo just tries to keep them happy so as to hold onto his country by paying tribute.