Looking at whole numbers, rather than beginning with percentages, is something statisticians rarely do -- with good reason.  

It's not meaningful to combine reversed and vacated cases.  Vacated cases are most often remanded to the circuit in question for reconsideration.  That doesn't count as a "black mark" against the circuit in the same way a reversal does.  The 80% figure you derive by combining those categories therefore has no real-world significance.

What does have real-world significance is the 0.15% rate of 9th Circuit rulings granted cert by the Supremes (irrespective of the subsequent outcome of the Supreme Court reviews).  That's ONE case out of each 750 cases ruled on by the 9th Circuit.  𝗢𝗻𝗲 case accepted by the Supremes per each 𝟳𝟱𝟬 9th Circuit decisions hardly points to an intrinsic problem with 9th Circuit rulings.  If anything, it indicates quite the contrary.