It would be very useful to have combo charts in analysis workspace so that we can trend metrics against previous periods like we can do in the standard reports:
Thanks for the feedback Melissa. You can plot overlapping time periods like this today using the line chart in Workspace, you just cannot set the chart type for one series to a bar. Is the ability to change individual series to different chart types what you are looking for?
It would be very valuable to be able to combine bar and line graphs for comparison (e.g. discrete numbers to rates). I would like to be able to see 'Product Views' for a site as a bar graph, and have 'Add-to-Cart Rate' as a line graph, but I would like to see the two in the same graph.
Combo charts are not possible yet, but Travis Sabin (Analytics Product Manager) is exploring this capability as part of a larger effort to revamp the Reports experience for non-analysts. It will be a few months before we have a concrete plan (very big project), but the foundations of the plan are being put in place now.