Phooey. I suppose I'll have to prove it with multiple quotes. Spoilers abound.
Equating the Jedi to the Sith and vice versa:"To believe in an ideal is to be willing to betray it. It is something no Sith or Jedi truly learned""
She defines who she is:
"Perhaps I am neither and I hold both as what they [the dark and light sides] are - pieces of a whole."
No doubt about that. She uses it quite well and often but listen closely as to why she uses it. Again, spoilerific quotes to follow:
In her early training to the PC:"Do not use the Force as a crutch. You have survived long enough without it. Do not use it to weaken you."
On her own usage of the Force:
"I use it as I would use a poison and in the hopes of understanding it, I will learn the way to kill it."
The source of her real issues with the Force:
"It is said the force has a will, it has a destiny for us all."
"I wield it but it uses us all and that is abhorrent to me"
"Because I hate the Force. I hate that it seems to have a will, that it would control us to achieve some measure of balance when countless lives are lost."
"But in you. I see the potential to see the Force die - to turn away from its will and that is some thing that please me."
Her goal is merely to gain control - always a big issue with her - over her own destiny by killing the Force. She cares nothing of the Sith or the Jedi as she's been exiled from both. She only wants to eliminate predestination.