I doubt that, too. After all, the dissolution of the Soviet Union was not done in accordance with to the Soviet Constitution. It was a political decision. Let us not fool ourselves. It is the mentality of the people and of political leaders that holds a country together and make government effective.
Rules only provide the framework for what people want to do.
The existing mentality is such that no matter what amendments might be adopted today, the next president could rewrite or reinterpret the Constitution once again. And this is not unique to Russia. Look at other former Soviet republics. Niyazov of Turkmenistan enjoys presidency for life, which was not initially in the Constitution of that country. Some people I just do not understand.