All the areas of concern mentioned up until now have been centered around pools of sand at the bottom of the larger down hills that have the potential to injure an unsuspecting rider. The switchback rooted section along Oakley Park is only "difficult", not dangerous. You have to slow down so much with the hairpin turn, the only thing you could hurt would be your pride if you have to walk your bike up the hill. Maybe that section will get worse with continued erosion, but in my opinion, that section should be further down the list for now.
2013 Specialized EPIC Comp 29
2013 Trek Rig SS
2004 Gary Fisher Cake 3 - RIP
"If you never fall, you're just not trying"