I don't think Russia or Saudi Arabia will face punishment for human rights abuses seeing as they are not members of the U.N. It would make if very difficult to hold those countries accountable if they are not held to the same rules and guidelines under the U.N. member agreement.
Yes, these countries will face punishment for human rights abuses, but it may take time. The world is starting to see what these countries have done, and eventually other world powers will do something to stop them. They may have to declare war against Russia, if that is the only solution.
No, Russia and Saudi Arabia will not be punished for their human rights abuses. The U.N. Human Rights Council was formed to promote and protect human rights and they let those two nations in. Either they don't care about the human rights abuses of those two nations or they think being a part of the council would make them change their ways, but I'm sure the council knew about their abuses. Russia and Saudi Arabia won't be punished because they haven't been punished to this point.
There are many countries with horrible records on human rights that are treated favorably by the U.N. because these countries are developing countries. Countries like the United States that have money are basically bullied and blackmailed into funding U.N. actions over alleged human rights violations only because they fall for the ploy.