I took a look at the entrance exam at the uni I wanted to apply to and was shocked. Thankfully, I had my dad and he went through Skanavi's exercise book with me.
I look at the USE math exam every year and it's much better than my final exam (although I like gaokao more, it has more varied problems that make you combine different areas of math), but I don't know where the cutoff point for "I won't get into trouble for my students' low results" is.
These standardized tests are changed little by little every year and are simply meant to a) ensure similar educational standards for smaller and remote cities b) enable kids to apply to any university in Russia.
Although some specific parents and teachers in particular school might want to focus on repetition of the same problems and tasks it doesn't mean everyone will and it certainly didn't affect me that much. In fact, having some definitive rules on how they assess an essay in Russian helped me get 100% for it the first time, since it was objective.