The issue is, I don't see NRx providing a clear difference between monarchy and modern demotic dictatorship, and clear ways of preventing the first from sliding into the second.

I've read Hoppe years ago, so far I remember I have not seen a solution to that. The only thing I remember is that a king si really really sure his heirs will inherit so he has a vested interest in not screwing up a country. But such sureness of inheritance means the people really consent to monarchy that is in practice a democracy.

Furthermore I don't understand the whole idea of starting on top, i.e. designing a form of government, instead of starting in the bottom, like the morals and culture of the age.

I mean, for example, if monarchy is so much more desirable then it is obvious why we don't have it: because we as a people became more depraved and not worthy for it e.g. having too much envy.

Another thing I don't understand in these designs is that they are about drawing rules when in reality it is possible to act outside the rules, this is called revolution or coups. Thus a realistic political philosophy cannot simply say if everybody accepts these rules all will be right. The very first political philosopher, Aristotle, wanted to figure out which rules are simply the more likely to obeyed, as in, the least likely to lead to coups and revolutions, the least likely to cause behavior outside the rules. It seems NRx like everybody else is simply trying to find good rules today. This is a really short-sighted. BTW aristotle's solution was a kind of democracy where the rich have more votes. We have this, in practice (the rich buy votes).