I just found all my missing family this week. Called yesterday to see why and was told this is an upgrade. My husband & I have lost most of our thirds cousins from our lines, leaving us unable to compare matches. This new upgrade is very disappointing and now will not depend on Ancestry DNA for matches.
As far as making trees public, over 80% of what is in trees on Ancestry is wrong, people think just because a green leaf appears it is a match. I have downloaded my v1 data base for future reference.