Man, this is incredibly interesting and useful stuff. This visualization "Errors and Report Elements" tab or "Dashboard 2" shows Errors on the vertical axis and the number of extension report elements on the horizontal axis. The two screen shots below are for LARGER and SMALLER reporting entities. You can select which groups you want to see. The really interesting thing is to look by Generator!
This is a visualization of errors and extension concepts for larger entities: (fewer errors, more extension report elements)
This is a visualization of errors and extension concepts for smaller entities: (more errors, fewer extension report elements)
Reach your own conclusions.