I get the feeling I might want to wait for the next point release before deploying on anything other than a test platform. In the meantime, I'll play around and see how it works.
In the mean time, take a look at the rest of the documentation for the coming version: http://bdr-project.org/docs/next/ . It's worth thinking carefully about whether multi-master is right for you and understanding the trade-offs involved with multi-master in general, and BDR in particular.
BDR's development is driven mostly by customer priorities. Currently we're focused on improvements to dump and restore, DDL replication, and node removal, plus some backporting of 9.5 versions of underlying features.
There's no current work planned on things like skipping DDL replication for tables that are not in a replication set, table sync when replication sets are changed, etc.