New visualization option for reports

[#1]

I personally don't see much difference between scatter and bubble charts, I actually never use any of these either.

On the other hand, I think a treemap would be much more useful, here is an example:

http://www.co2scorecard.org/countrydata/treemaps

Could we add this format as an option (additional or replacement of scatter or bubble)?

[#2]

This is a really good idea. Especially for the Site Section report. With a treemap visualization it is easy to see the comparative sizes. And if you click on one of the blocks you would see the sub site sections.