Would be nice if I could create a metric group to easier add the same set of metrics for different reports.
e.g. I could put PV, Visits, Visitors, Time/Visit, Entries, Exits into a group called "Page Traffic" or Events 1-5 into "my standard conversions". So any time I need those metrics I could just drag&drop this group and it would expand to those metrics.
Primarily added this idea for Discover but I guess it applies to SC15 as well.