Yea, I get you with the closure thing. It would be nice to get it, although those old bones don't talk anymore when they get kicked around in the closet.
I would venture that there is still a part of him, and your life together that you miss occasionally.
When that happens for me, I try to just accept that my life then was pretty good, and my life now is even better. Yet there is a part of me that ties those old memories, and that it is okay to miss that.
I would worry more if you DIDN'T miss certain aspects of your old life.
You had a history together. Many wonderful, memory building years that the Gavel can NEVER erase.
For me, I have come to accept that I don't miss the person that my X is now. I miss the girl that walked down the aisle to me many years ago. Once I found THAT perspective, things fell into place, and they come and go rarely now.
I think THAT is the person that we tend to focus on more so than who they are now.