I agree wholeheartedly that if we are given or could know the position/velocity and mass of everything (these are, in theory, knowable), we could then predict its future path, thus creating a certain determinism of sorts. Regardless if our will is free, can anything ever happen randomly? That, in and of itself, would suggest there is a freedom separate from predetermined positions and momentum.
Consciousness, too, is a great question. Because even as I write this in reply to what I perceive to be someone else's consciousness, there is no true test to prove its not my own or a simply a running program. And my perspective of said conversation is from a particular vantage point and nowhere else.
All that to say, however, without the delusion of free will, life might seem less interesting. I also agree that it does not change how I live life.