Wow! This is really a good thread.
I do think that by the end of his reign, Nicholas was so isolated that no member of nobility could have changed his course. His only counselor was his wife and she relied on Rasputin.
I also wonder if the working conditions and living conditions the nobility afforded the peasants contributed. That was one thing it seems the could have done something about. Most of the living conditions for the peasants were deplorable. For example, I recently read that when Ella married Serge he didn't have one midwife or doctor available for the serfs living on his property. The infant mortality rate was about 98 percent and about 68 percent of the women died during childbirth. I have no idea how many thousands of serfs worke for him. As we all know, Ella persuaded him to hire one midwife. So many women and children needlessly died because of his actions. That is something Serge could have done something about long before Ella arrived on the scene. And even then, he did the bare minimum. It would be interesting to know what would have happened had the nobility paid as much attention to the lives of those that worked for them as they did the whisperings about the Empress.