The damage has been done, there is no way blizzard can revert back to RPG systems like mana without alienating the Massively Sharded Online (MSO) Third Person MOBA fanbase it has created in modern day WoW.
The best bet would be for bliz to continue down the same path of homogenisation every new expansion until each class has only a health bar and 4 instant damage abilities left, making the game and it's ability rotation playable on a guitar hero controller and finally turning it into the true basic b**** rhythm action game that Activision wants it to be.
Pressing said rotational abilities will also net +0.00000001AP per press, with a 2x multiplier if you nail pressing the abilities as they flash up on screen rather than simply rolling your face across the neck of the guitar. And as an added bonus, for anyone who actually reaches 1AP they will unlock 2 additional main backpack slots!