A few things people are not taking into account. First being outside of Abyssea MP is still a precious commodity. A WHM is forced to choose between /RDM refresh + convert and /SCH utilities, a WHM will get +3mp/tick from gear assuming they were lucky enough to get a +1mp/tick hairpin. /RDM is 3mp/tick and /SCH is sublimation.

Now RDM main,
Same 3mp/tick from body + chapeau, but my Refresh II is 7mp/tick, this standing outside Abyssea I'm looking at 10mp/tick while breathing. Combine this with a sub 9m convert timer and we're still the kinds of MP restoration. With /SCH or /WHM we get all the -na's and erase and even an aoe cure or two. We have mild CC ability for emergencies, and the gloriously awesome Saboteur Dia III for "kill it now" moments. Only think preventing us from being forced back into WHM-1 is the lack of "Cure V". I've had various LS leaders and event planners make that comment many many times, that if only RDM had Cure V they would put us in the melee PT and wouldn't need to find another WHM.

So yeah Cure V would be a very bad thing for us. Now SCH on the other hand is already a WHM + BLM, their supposed to be masters of both magic types but only one at a time. They should get Cure V under apendum white, just like their getting tier V nukes under apendum black.