I think you need to really be open to listening to his complaints, after all its how he feels, whether they're justified or not, its just a step in the process that lets him feel his voice is being heard.
Next, I think you really need to let the counseling process play out or your going to be right back to square one. Hopefully he gets a good pro marriage counselor to talk with.
Its also important that the validation continues, so he feels more inclined to open up to you in the future. Not keep holding back. I think about you often, and am proud of the way you've hung in there. But you know the real work is about to start.
I certainly cant give you advice on how to proceed, except to be patient in the process. All indicators are positive, so be happy with progress. I'm sure there will still be tough days ahead, and for a while it still may be a two steps forward one back, but forward is forward. Please don't rush to just be a couple again until both your lines of communication are open, and open freely.
Hopefully the positive news keeps flowing. Stay positive!!