We've identified the unintended inconsistencies in the HP/Mana/Endurance formulae that were causing inflated values. We've readjusted the values to be more in line with expectations and to help prevent problems like this in the future.
The net result of these adjustments will be that everyone should see a benefit Over the values present at the launch of Seeds of Destruction, although you will notice a drop from the most recent values if you're level 81+.
This change is now available for testing over on the Test Server. You can use /testcopy on the live servers to get your character copied to the Test Server to check out the changes.