I do indeed feel like that the mage part of Red Mage does feel a little neglected, especially when Dualcast has been a huge draw to the job in previous versions of it in the FF series. It would be cool to see some variety in function for spells.

That's just my personal opinion though of course, because the truth is that XIV RDM is not a """traditional""" Red Mage and probably never will be. The premise of a jack-of-all-trades wizard that uses both White/Black magic does not really work in XIV which has focused its combat on instanced boss encounters with a rigid trinity role system. Not to say that trying to make a balance/middle ground is a futile effort of course, but more so that XIV has made it clear on what it wants its own Red Mage to be, which seems to be a magic musketeer duelist with some support elements.