I see where you're coming from but I would encourage you to try harder to get a higher score in the advanced ranking.
You're a bit of a black sheep, maybe too good for intermediate but struggling a little with advanced... though I don't think your level should mean that you are consistently getting 90s the whole time, and I don't expect myself to get 90s in master class either. As the difficulty of songs go up so do the complexity of the techniques, if you notice a pattern of things you fail at then I'd encourage you to practice it and practice it, it could mean the difference of that 10% you're looking for . Finally I don't think any of us will get better without challenging ourselves, if intermediate is too easy for you then you will not get much better playing on that level. People ask me how I've gotten as far as I have in only 4 years of bass through Rocksmith and I tell them this, "Challenge yourself. When you're uncomfortable it means you are growing as a person, it's a good thing."