I think it is pretty clear that Dostoyevsky intends for us to think that Raskolinkov has been redeemed. I think that we can see this in the following ways.
First of all, his dream of the virus matters. I think it shows that he has realized that he is not superior to everyone else. He is coming to realize that he is not the only person who understands the truth.
Second, the way he feels that last time that he holds hands with Sonya matters. He feels that he truly loves her now. I think this shows that he has changed compared to before when he felt revolted holding her hand.
Finally, right at the end, he picks up the New Testament (not the whole Bible -- just the part that emphasizes redemption). At that point, Dostoyevsky tells us that his redemption would be a matter for another story.