It would be nice if perhaps we could get something by E3 but it's really hard to say, I'm sure they are working on class concepts as we speak but it all comes down to when they want to reveal them. Just like the Greatsword I was dissapointed we never get anything that resembled the Miquote's barrier magic since it did look like it could make for a unique concept that could act as both an Offensive/Defesive magical concepts. Erecting up barriers which could improve your defense against certain elements, avoid certain attack or barriers which enhance players withing the area of effect as long as they remain inside it and such.

Though with the whole falling of Dalamud they could easily introduce a new magic user into the mix perhaps one "blessed" by the aura of Dalamud reaching Eorzea unlocked some lost magical knowledge or something lol. Popularity wise we might see something resembling a Red Mage/enfeebler type of class or perhaps they'll be more adventerous and introduce a magical/pet class to us.

I guess whenever the player poll results are released we'll have an idea of what they want to work on and perhaps even some interesting sketches or ideas behind each concept. Hopefully it won't be to long til after 2.0 though since it would be nice to have more classes introduced so we can have more abilities to mix and match for our classes.