A lot of wonderful Christian people go to Evergreen and other GC churches and are doing good things. And, a lot of wonderful Christian people have left Evergreen and other GC churches and are doing good things.
The point I would make is that the lifestyle changes made in the life of the Loeckens and everyone else is because of what God did and is doing in their lives, not because of what a particular church did or is doing.
John Piper's tweet yesterday hit home for me and speaks to this issue.
How totalitarianism happens. “You have saved our lives; may it please my lord, we will be servants to Pharaoh.” (Gen. 47:25).
I had an ECC pastor's wife say to me once, "You don't understand, my husband is a different man because of ECC."
That said, I do recommend reading the link. Very inspiring.