It would be impactful to clearly highlight MoM & YoY performance on an executive summary in Traffic Analytics. This would offer an effortless experience for users managing analytics within this tool.
Reporting on growth is how many users (and agencies) leveraging this tool are measured within their organization - this would solve for easily 'reporting up' performance metrics.
This would also offer clear insight into where monthly/quarterly focuses could be and where to begin looking deeper for a story within the data.
Within the Attribution tool, affording users a clear view of MoM & YoY by 'Dimension' type would be a huge value add.