RDM was anything but inefficient in FFXI. But furthermore, RDM is a third part these things, because that's what Red Mage is. Final Fantasy has an established job system, Red Mage has never varied wildly from its roots in this regard. FFXI was perhaps the biggest departure for the job.
Not to say that innovation is bad, but people expect something specific from a Red Mage, their love and attachment to the job is based around these expectations. Hence this thread, and half the people posting in it.
But last time SE tried to wildly depart from the expected job system... well look what happened.
Do you not understand the concept of diminishing returns? There are other limitations that could be implemented to ensure balance. It's really not OP at all, in fact, unless they can actually replace a key role permanently, which they wouldn't be able to.
They'd essentially be able to replace a healer with a group that only needs that extra healer slot for a certain part of a fight, or almost doesn't need a second healer, giving them an edge on DPS during the rest of the fight. And they'd be able to replace a DPS in a group that's having trouble with heals, but no trouble with dps, etc.
In an "ideal" raid setup, for players who have already mastered content and are just trying to go faster, RDM would if anything, be underpowered, with the possible exception of raid content where 2 WHM is absolutely necessary for part of the raid, but not the rest. In which case, bringing a RDM instead of 1 of the WHM would allow them to DPS the rest of the instance.
Right, because forcing an entire job to drag around 4 sets of unique gear sounds smart. Let's not even discuss itemization of RDM specific gear, or point allotment.
RDM would be more than pointless given this setup. What you're talking about isn't a true hybrid anymore, but a hybrid in the way that Blizzard likes to define the term. A class that can respec to any role.
Why else would RDM be pointless if it could simply respec to fit a role before a fight? We can already do this, we can already change jobs and gear between fights. Why would I bring a RDM if I can just bring someone who has BLM, WAR and DRG leveled?
Unless RDM is better than one of those, in which case, why not just bring 8 RDM?
Having the ability to switch roles in combat, if limited properly, would essentially allow a RDM to smooth over content, by turning one of the party slots into whatever is needed most at the moment. It would never be able to outright replace the main tank, main healer, or primary DPS, but it would be able to replace an off tank or off healer in a group transitioning from clearing to farming, or replace a DPS in a group just learning an instance.
Not that it would be entirely useless for other situations, it would just be outclassed by other jobs that can permanently inhabit a single role. But I'd be willing to pay that price for the versatility expected of RDM.