I understand what you are saying but, the ideas are slightly different and I mean no offense with this;
The freedom of Will in Luciferianism is that we are not under the Will of a god such as the Abrahamic/Christian god. Free Will to me is not the same as Freedom of Will, or better yet Freedom 'from' another's Will (that of the Will of God).
Christian "Thy Will Be Done"
Luciferian "My Will Be Done"
This is also one of the premises that separates nontheistic Luciferians from theistic ones, in that to think of Lucifer as the Christian Fallen Angel is to remain under the Christian guidelines so to speak.
On the other hand, Lucifer as a Principle, an Archetype allows the freedom and separation from beliefs in gods and such, and ultimately separation from the objective universe and the gnosis of our True Self, our Daimon.