Does Veda Consulting's dedupe workflow extension work on 4.7? Or is it now in Core?
I think this pull request, that was merged into 4.7, contains at least some of these improvements. But not the functionality from the extension (as far as I know):

https://github.com/civicrm/civicrm-core/pull/6432

Check out the new functionality on the demo site, and see if it meets your expectations.

http://dmaster.demo.civicrm.org/