It's not so much that MRD necessarily needs a damage boost, it's just that there needs to be content in which a MRD may fit.

From the get go, this game has been about not attacking the yellow mobs. But MRD shines when attacking more than one mob. For example, the Skeletons in the Batraal fight. Even though MRD is a lame duck up to that point as it has no place in the Deepvoid Slave battle other than being an MP sponge -- unless it's the tank, of course.

However, if SE intends to make more battles like Dzemael then I agree that MRD needs to have it's focus shifted from okay damage to multiple enemies to significant damage to one enemy.