Really this argument isn't so much about whether or not RDM and SCH should get Cure V so much as it's an argument on whether or not they should be adequate 'Primary' Healers.

To which my answer to that is a flat no for many reasons.

Putting aside any debate as to the course of the job and the Melee aspects of RDM, the most important reason I do not see Sch nor Rdm as classes who should become solo healers is due to the number of other hybrid classes in the game as it stands.

Too much right now do players seek to standardize specific roles to one job. You see this in how people try to establish pecking orders such as who's the best DD, when each job has unique utilities and functions that allow them to be more variant than the bread and butter playstyle.

With capasities in jobs such as Blue Mage and Dancer to be able to heal, there is no true insentive to try to force more 'primary healers' in the game. Stated plainly, the duty can, and in my opinion, should be split. The ToAU concept of pushing healing and support aspects on as few slots as possible to maximize damage output was seen by me as a failure of concept, especially considering the job that fell into that one slot more often than not, was NOT the healing specialist.

As far as pecking order goes I believe SE has finally gotten it right. White Mage is the go-to specialist on healing, and the rest of the jobs have varying lesser degrees of healing they can provide to either assist a white mage in healing, or to split the duty among themselves while providing their primary roles to the party still.

The reason why Cure V has become a symbol on this matter is because it provides the big, one shot healing that serves as a major hamper against specific cure-possessing jobs, such as Scholar and Red Mage when they do not posses it. To which I say simply, instead of trying to rely on one or the other, invite them both, or some other hybrid variant.

Dancer, Blue Mage, Puppetmaster, Summoner, Paladin, Dragoon, Scholar and Red Mage all can provide some HP recovery to other members of the party on a regular basis, to varying degrees. Many combinations of the two of them are sufficient enough to handle the healing load for most general purposes. There's no reason why they cannot be made use of... and really, SHOULD be made use of more often. The curing shortage people are expriencing should encourage more variant groups, to accompany Offense Defense and Support, instead of searching for a single sole healer who shoulders both the burden and the blame more or less on their own.

White Mage has the incredible curing potential to handle this with minimal support, but that is because that is the job's primary function. Instead of trying to create more jobs to compete on this function, each of the other jobs listed above, as well as other jobs in general should get more tools to help assist those who do manage the cure, and to lighten up the burden on HP recovery. That way we encourage a more variant base instead of the constant shifting to whatever is the current 'best' so often.

As far as Cure V itself, it really depends on how far and away WHM stays ahead. I like this distance they have. If we're to catch up on being capable support jobs, I want to see that improvement thrown to our Enfeebles and Enhancing magic first. Cure V is not the quick fix Scholar or RDM needs.