While I can agree RDM is on the lower end, I honestly still see nothing really wrong with it.
I may not be the best RDM, as I think im only like 89% on fflogs for RDM on O1S (granted i dont use potions or good food, but still, the difference added would be minimal), and then go down from there in the harder fights, but my "bad support" and "bad dps" have never really been an issue, due to content not being like midas. (in which case, then id say RDM needs help)
But I see other jobs in worse condition, and SE says "they are fine" so I doubt there's ever going to be any thought into changes to RDM, other than to make it less fun.