Why do we "ground consciousness in quantum mechanics"? Is there some experiment that proves consciousness is a phenomenon affected more by quantum scale effects? I'm astonished - I didn't even know we were at the point that consciousness was that well understood.
If OTOH you're just putting forward a conjecture then until there is proof we cannot know whether or not free will exists.
I have provided metaphysics that define what is necessary for free will Kant's noumenal self outside of time. Such a self is free because it is causally undetermined.
I have provided information on emperic and reproducable scientific experiments. Delayed choice quantum eraser experiments show that quantum phenomona can operate outside of what we traditionally think of as time and causal sequence.
I have provided robust scientific theory (Orch objective reduction) that argues consciousness is grounded in these same quantum phenomona that have been shown to operate outside of traditional time and causality.
Obviously from my stated conclusion I believe the Orch OR theory to be true. However this is not a question of metaphysics but one of science.
http://www.sciencedirect.com/science/article/pii/S1571064513001188the Orch OR scheme has so far stood the test of time better than most other schemes, and it is particularly distinguished from other proposals by the many scientifically tested, and potentially testable, ingredients that it depends upon.
From this one can conclude that current emperic scientific theory supports the existance of Kant's noumenal self which is required for free will. Free will is thus entirely consistent with modern science and undeniably possible. If Orch OR theory holds up under further and in depth emperic testing I would argue that free will becomes overwhelmingly probable.
"Physics of Life Reviews" is not a peer-reviewed paper I'm familiar with, and I couldn't see any other papers that were scientifically credible.