My H and I did MC prior to our first split years ago. All it did for my H was give him someone else to hide from. He quit going after he moved out that time, but I kept going. After I started to get my life back together and move on he came back. My mistake then was thinking 'thank goodness that is over' and moving on with our M. We still had a lot of work to do, but got gaught up in falling back in love.
I have become a real believer that IC is way more productive than MC in the kind of situations I and others here go through. There is just so much to come to terms with individually before you can be ready to deal with anyone else.