The one thing you have to understand in all this is, you can't fix this for her! She has to face the issues she has that are internal and work on them on her own. This is her journey and hers alone.
You have your own issues to work on. Just be glad that you face yours while not having a MLC.
No interventions, the only thing it will do is push her further away. She's asking for space, give it to her. She will deal with herself when/if she is ready to. You can not make this process go faster. Be warned though, you can lengthen it by trying to intervene.
The advice you're given is to possibly explain what is going on with your W. It is not given for you to take action concerning her. Any action you take needs to be for you and your kids.
You can not control her. The only one you can control is yourself.
This is hard and it takes a long time. Ask yourself if you think you can outlast your W's MLC. If the answer is yes, you can help pass the time by working on becoming the best possible YOU!