The segment featrue has improved a lot in the past and brought more flexibility into Omniture. The next step should be to make segments available on a metric level so that those "calculated metrics" become available as standard metrics for a report suite. This would allow to reduce the number of calls in ReportBuilder for example as well. Example: Visit is a standard metric. But in one report I also want Visits to Homepage and pull this number directly within in one call for my selected report suite rather than creating two ReportBuilder Jobs for the two metrics.