When it comes down to it, what's the difference between metaphysical freedom and epistemic freedom? Simply our knowledge.
I think I have free will simply because I don't know the future. I probably don't have metaphysical freedom, but that doesn't change the fact that I don't know, and therefore feel that I have free will. It's a useful illusion if it does in fact turn out to be an illusion, but then again, so is reality and our perceptions. Perhaps there's more important aspects to the question than just the answer.
As for moral responsibility, it's very difficult to accept that we are responsible whatsoever if we can assume that we don't possess metaphysical freedom. Once again, we assume that we have moral responsibility, just as we assume we have free will.
I think I have free will simply because I don't know the future. I probably don't have metaphysical freedom, but that doesn't change the fact that I don't know, and therefore feel that I have free will. It's a useful illusion if it does in fact turn out to be an illusion, but then again, so is reality and our perceptions. Perhaps there's more important aspects to the question than just the answer.
As for moral responsibility, it's very difficult to accept that we are responsible whatsoever if we can assume that we don't possess metaphysical freedom. Once again, we assume that we have moral responsibility, just as we assume we have free will.
Brevity is the soul of wit.