Mike, I voted to lose them.
This is based on the reflection I see in your bonsai of my own local trees. There are many old, hollow trees in my area, your olive is very similar to them. They all live in semi-open woodland or park land, and none of them (to my recollection) have skinny little knee roots
.
Without the roots, your bonsai becomes an ancient oak, possibly over 1000 years old. Maybe families of woodlanders have made a living selling the pollarded timber, perhaps they have fed their pigs on the acorn crop. Maybe a hermit has lived inside it for a couple of decades... maybe a king has taken refuge from parliamentarians in its branches.
With the roots, I'm just left thinking 'why are they there?'.
But you're keeping them, so it's all academic
. But what if you just cut off the sticky-out one? or do thay all stick out?
Regards,
Chris.