I just see it as the simplest option. They have a smaller Dev team than ever, and I have to imagine this is the easiest way to restore real demand from the job while keeping it unique from WHM. Client-side, at least, it is literally just a flag in the .dats. If they built their system logically, I don't really see why it would be more than that server-side.

If he could give me +25 STR, +20% DA, and more potent Cure 3/4s, my mule would come RDM a lot more often and would be a lot more useful when he came. I have to imagine this would be the case in any old-content event, where you're typically would take increased killspeed over WHM's defensive advantages/Cure V+VI/etc.