I think canceling the attorney is a mistake.
Your husband has some serious issues, and agreeing to these boundaries is a good step, but only one of many in a long, long battle.
You have a series of knock out blows and that can be hard to handle. Are you in IC? I would consider, very seriously, working the 180 for awhile. This isn't about your marriage. This is about YOU and what you need to live a happy life, and about HIM and what he is going to do to fix himself. MC isn't going to do that for him. He needs to be evaluated by a sex addiction specialist and enter serious, hardcore therapy.
I encourage you to focus on yourself. He needs to work this process for HIMSELF.