I would throw this out there....

While other casters might need adjustments based off what we're seeing from RDM, I would mention that as far as player skill required to effectively DPS as a RDM, the floor is pretty low, additionally the skill ceiling required to play the job well also seems pretty low. It's an easy and accessible job to play well. The other two casters, not so much. There's more going on to keep track of and manage, and I would argue that we're only now starting to get to the point where people may have had enough practice at SMN and BLM to determine if they have higher potential DPS than a RDM does.

Additionally, when we look into what the Devs have stated as far as how much DPS a job should do, they look at how effected the job is by mechanics and how much utility the job offers. SMN is probably the least impacted by mechanics of the three as your DOTs don't stop ticking when you have to move, and your pet will keep attacking, add onto that the ability to infinitely cast while moving with Ruin II, and you aren't really punished much while still having raid utility at least in the form of combat raises. BLM on the other hand is probably the most severely impacted by mechanics with having to leave their leylines, and just having Scathe as a spell that can be cast while moving as well as their primary utility function, Apocostasis, has been moved into a role action.

Ultimately BLM should be the king of caster DPS. If that's not the case currently, then the call should be to buff BLM, and leave RDM as is.