I love the track. But the AI needs to be fixed for the track to get 5 stars from me. There is one part of the track (early into it I believe) where the AI will hop a curve and crash into a tree. This ends up happening about 98% of the time. Also there may be a bug with the AI exiting the pits where they will almost stop on track (and get slammed into by other AI). Outside of that, it also has issues with CPU > 99% where I had to almost turn off/limit/tone down my settings and I still had the same issue.
AI issues are mainly related to the latest AC updates: also on other tracks with similar obstacles/walls/trees near the valid surface will occasionally cut to much on a turn and hit something.
I am looking into it and trying to make things better by moving away most dangerous stuff, still most of it is in Kunos hands (and i do havefaith in Kunos).
About your 99% issue, i guess it's down to the same issue: AI is piling up after a crash, going nuts and occupying all of the CPU :(
This is mainly happening with fastest cars so you might want to try lower classes for the time being :)
...and btw, v0.8 is not that far :)