I'm not sure why you are calling this a new paradigm. Don't most, if not all, therapists deal with depression as a symptom for necessary changes in life circumstance? Yes, every particular case is different, but in general, therapy is meant to motivate you to make a change---either in perspective, or practice or upon external sources of angst.
You're right, this is not new to psychology itself. It's more of a direct challenge to the culturally powerful psychiatric/biomedical approach to depression and anxiety.
My experience is no, most therapists don't deal with depression as a symptom for necessary changes in life circumstances. They'll expect you to talk about your feelings and so on. I've never heard of one saying your life sucks, change your job and make some friends. Which would often actually be helpful.
