I'd be up for a Mystic Knight melee DPS that uses one-handed Hammers/Maces/Axes. But there's only so far it can really go in the 'Rune Fencer' direction.

Considering that Rune Fencer has been cannibalised by Red Mage, which has an enchanted sword combo and some of the same skills as XI's Rune Fencer.

We're unlikely to get any en- skills, because that's what RDM's enchanted melee combo is, just without the elements, because XIV doesn't do elemental damage.
But it could do something around the bar- skills as a counterpart and contrast to RDM's role.