Though I wonder, are they a good measure?
I know the numbers but at the same time, classes like Blm also have a noticaly lower amount of parses although they have the most fluent and well-designed gameplay while others who are in a worse spot get played more often.
And one of the most common reasons people state for not playing Ast anymore is the changed card system but overhauling that would be much more work than adding a button or two to all healers. At the same time, MP issues are so easily alleviated by just melding Piety.
I doubt SD will see a major overhaul but more likely a tweak to make it less punishing and a bit easier on controler players.