Allow users to create and share segments across multiple report suites in SiteCatalyst and Discover, this includes the Data Warehouse.
E.g.A user with the right permissions can create a segment in any of one the above tools and they should have the ability to share this across the report suites available for that company, additionally a segment created in SiteCatalyst should be replicated in Discover and the Data warehouse and vice versa (say 24hr later)