Is there any point in doing the WHM quests?

My WHM is already level 50 from 1.0, I did all the CNJ quests to get the missing spells like Cure II. Then I got the WHM crystal (which I already had) and did a few WHM quests, but I notice that they're just giving me spells that I already have, like Regen. Is there any point in continuing them?

If you are already 50 and there is no difference, I would say no.

Relic, Achievement.

Extra spells.

Relic and achievement is the only reason, you won't gain any extra spells from the WHM portions.