Hi AllThings,
My husband and I started marriage counseling when he was in rehab, and we continued it for months after he came home. It was very helpful to us, and I often recommend it to others. What I found is that both people have to be committed to it & willing to give it time, and both people have to be open to the process; its about both of you - not one person blaming the other, but working together to communicate and share what they feel works in the marriage, what doesn't. Feelings of both people have to be validated IMO.
We both did individual therapy while this was going on. My husbands rehab was not based on 12 steps, but solely on principles of therapy. He said adding in marriage counseling helped him work on his own personal side of things in individual therapy, and I felt the same way.
I would give it a few sessions before deciding it if has potential to help. I think it is a good sign your husband is willing to participate. Hope it works out for you both !