Distribute "Basic Mode" and "Advanced Mode" to every configuration screen.
They are perfectly right, but also important/specific/complex configurations should be possible to make.
So... why don't you make default to any screen the concept of "Basic Mode" and "Advanced Mode", just like seen in "Jails > Configuration" screen?
This way... the regular user wouldn't be bothered with lots of fields, and every need of expert users would be configurable.
Just an idea, ok?