Given current role to content distribution with 2 melee slots considered as is the intended nature of fight design anyways, melee and healers need more jobs.

Raid content
Tank to slot ratio 4:2 sometimes 4:1 (24 mans)
Healer to slot 3:2
Ranged phys to slot 3:1
Caster to slot 3:1
Melee to slot 4:2

Healers need the next job hands down, after that its a toss up between melee and tanks, but i think tanks is more likely.

My point: another melee is more justified than any other form of dps.

And im fine with rdm comparison in this thread, but the highjack for redmage problems and for redmage reworks is absolutely a highjack.