I just stumbled on this post (I've never been to the site). But the headline was enough for me to be compelled to reply. I agree with you! I have argued that the significance of a life cashes out 100% in terms of emotions/feelings.
Having said that, I must acknowledge that there are a number of details that I have not worked through. For example:
Are emotions judgments (and therefore mind-to-world expressions of intentionality) as Martha Nussbaum argues?
What is the difference between a "mood" and a "feeling" or emotion?
Many highly successful people seem to be much more sociopathic than I am comfortable with. And they seem pretty happy. Does that mean they're doing it right and I'm wrong?
Feelings are not very easy to study. Are you sure (I ask myself) you ought to base the value of human life on a private, first person account of emotion?
Anyway, glad to run across your post.