Concept for a Magic Melee DPS

[dinnertime]

creating a new class based on magical melee damage risks restricting the job to a pure caster role which is kind of the opposite.

That's like saying a Job shouldn't have its own original gimmick because another job borrows it by a small margin which sounds pretty unfair for the job that actually owns the gimmick. I don't see the "risk" here anyway, especially when DPS jobs play a lot more differently than other roles when compared to each other. They can have similar concepts and abilities lore-wise (BLM and RDM both using black magic for example) but still be unique from each other in gameplay.