Just got this email from Adsense and it caught my eye...
"Based on feedback from publishers, we are piloting a beta initiative to provide more information to publishers experiencing deductions in their earnings. We hope this information helps you to better understand possible causes and work on improvements for future months."
Hopefully, we will get a better information to work with when rooting out invalid click activity. It's a long time coming and can only benefit us, Google, and advertisers.