Play-test content in Official release

[KainPen]

I was looking through the conversation guide yesterday and I noticed they recommend an archetype or two from play test documents to be used in place of classes or missing archetype from 1st edition. I did not get to play the play test when it was active. But it made me wonder, if there is any more content from it beside the mention archetype, that would be valid for use the official release. Would any of it be game breaking with the way the system is setup now.