Sebastian and any other HPE folks reading this,
I echo TommyB's sentiments here. I went through the same fun and games (complete with an HPE DP health check, looking at all the reports I ran, and running the calculations) and I had to purchase about 50 TB in 2014. Now the 9.06 bundle is kicking off a warning that I need ANOTHER 96 TB of licensing - when the backups really haven't changed... if anything, they're less than they used to be.
Dangerous precedent being set here. Changing the calculation is way too easy - and there's no warning AT ALL.