Here are just a few links to additional information regarding this new feature, the drawbacks, and how to work with/around it. I hope that others will continue sharing their experiences on this thread, and post links to info on the same subject. Most important, be sure to give Ancestry your feedback, and encourage others to do the same. Keep the pressure on to allow us access to the science behind our matches (how we match, not just who we match).

(Edited to include more links and a few notes.)

http://www.legalgenealogist.com/blog/2015/04/05/still-waitin...

http://dna-explained.com/2015/04/09/dissecting-ancestrydna-c...

http://dna-explained.com/2015/04/07/testing-ancestrys-amazin...

http://dna-explained.com/2015/04/03/ancestry-gave-me-a-new-d...

https://digginupgraves.wordpress.com/2015/04/02/ancestrydna-...
(note in comments at bottom how many customers were given the same "new ancestor" - Obadiah Pierce)

https://digginupgraves.wordpress.com/2015/04/08/how-to-use-a...

https://digginupgraves.wordpress.com/2015/04/10/kenny-kenny-...
(how the concept "beta test" went wrong)

http://timflight.com/genealogy/ancestry-clarifies-ancestor-d...

http://dna-explained.com/2015/02/02/getting-the-most-out-of-...