Nicely done – attractive report, easy to navigate and very effective use of drillthrough. I particularly like your use of the small tab to highlight the drillthrough capability and when it’s available.
A few constructive suggestions:
I feel like your visuals could use some additional titles and/or legends. Many of them are not interpretable at all until you mouse over and read the tooltip.
The funnel chart typically implies a narrowing over time/process, e.g. sales pipeline. That’s not the relationship that exists between regions – I think a different visual would have been more appropriate here.
I really like the color scheme you used throughout, except for the sudden and unnecessary shift made in the donut chart.
On the cumulative chart, decrease the size and frequncy of data labels. As is, they are a bit hard to read and somewhat distracting
For the two current versus previous visuals, I think it would be easier to read and interpret if you had a single line on the graph the representing (current-previous), centered around 0 on the Y axis.