Admittedly as it has been pointed out to me before, its unlikely we will be getting any JAs or Traits that effect our melee, we seem to get spells that do that, and well. I mean for instance we didn't get Double Attack as a trait, we got Temper which is far better, originally its only 5%, an average RDM might have it at around 10%, however if you have a really good Enhancing Magic build, it can hit 20%. If we had something very similar, or even the same, for Attack/Accuracy, you could see RDMs on the front lines today. The main thing past that which holds RDM back would be gear, I constantly point out how RDM gets the mage side of gear, and is left out of the melee sets like Thaumas & Athos, which would really flush out our melee alot more thanks to the increased options & stats we would have.
In my opinion these are the 3 things RDM needs to fix the job.
A) Add Brave & Faith.
Brave & Faith should scale with Enhancing Magic, however they should not stack & should have a fairly long cast time, such as a cast time of 15 or so seconds(11ish seconds after lv99 Fast Cast trait). They should scale as Temper does, starting at 5% with low skill, and reaching 20% at 500 skill. Brave should increase Attack/Accuracy, where as Faith should increase Magic Attack/Magic Accuracy. Doing this allows RDM to be fairly potent in both forms of combat, however not at the same time. Neither spell should have negative effects, and neither spell should be able to be cast on others. The only real problem with this I see is that the Magic Attack Bonus from Faith, may cause worry in SCH & BLM. However RDM is limited to T4 spells, and I doubt BLM's better Magic Attack with T5 Nukes, or SCH's weather bonus with T5 Nukes, would be threated by RDM, even with the maximum effect.
B) Add more gear options.
RDM currently is restricted to mainly mage gear, however we do occasionally get melee gear as well. The magic gear for RDM is great, and grows alot, however when you take a look at other jobs, RDM can feel as though its physical power is forgotten. Emp gear gave many jobs massive boosts to many stats, including but not limited to, Haste, Attack, Accuracy, and skill of their main, or secondary weapons. RDM did not get this, RDM had the same treatment as WHM, BLM, and SCH, a set of JSE gear that focused completely on nothing but magic. The Estoqueur gear is by no means bad, but it is only for magic, being stacked with MND, INT, Magic Accuracy, and Magic Attack, along with magic skills. When looking at what other jobs got, this leaves me feeling as though our melee was forgotten, and even with more recent gear giving RDM some melee options, there are still massive shortages in gear we do need, such as WS gear like Athos, or TP gear, like Thaumas. Events which are actually great for gear on RDM, often are not for other jobs, such as Arch-Limbus, and Meeble Burrows, which offer some good gear for RDM's melee side, but little for other jobs, making it hard to get help with these things, especially as a job that is often left out of events, and has to solo things itself.
C) Increase Skill levels, and make current skill levels more meaningful.
We all know RDM has the highest rating in Enfeebling Magic, the highest skill in Enhancing Magic(excluding SCH during Light Arts), and decent skills in dagger & sword. However the use of Enfeebling has died out, there has been little reason to enfeeble anything in sometime, making this feature of RDM, nearly worthless. Enhancing Magic is ok, however its very limited to RDM, SCH has much better buffs for their party members, WHM has AoE spells, and much more powerful Barspells, Protectra/Shellra V, and Boost Spells that effect the party, rather than RDM's self only Gain Spells. All of this leaves RDM's enhancing far behind, and the only unique Enhancement RDM finds itself with that it can cast on others, is Phalanx, which loses its use on higher leveled, harder hitting content due to how it works. Sword & Dagger skill levels are good, however this plays into RDM's problem as well a bit, as its melee loses some accuracy & attack, which is much harder to make up for with gear than it is for many other jobs. In the end, our skills are nice, but without much to use them on, making them fairly meaningless. Bumping up Sword & Dagger to a B+, or A-, while adding new potent, and exclusive Enfeebling Magic & Enhancing Magic, should help RDM become useful again both as a melee, and a mage.
These are the 3 things I think RDM needs to be fixed. With these, we would get new spells, to make our Enhancing & Enfeebling more important, we would get new gear access, so that not only would we be potent mages, but potent fighters as well, and we would have the ability to fill a role better by using a buff to improve our position, while not overrunning jobs that currently hold those very same positions. I think this, would help make RDM the versatile hybrid job it was meant to be, and has fallen away from in recent times.