Well,honestly, yes.before you get to heavenward you see Ast all over camp dragonbone so that was going to come evently, You see the Samuria in hw and the red mage so you knew that was coming. We have dancers since reborn all over the place so you knew that was coming. Both Raubhaun and Griffon are blue mages so you knew they had to add blue mage. And you knew they had no choice but to add gunblades as a job because the entire imperial army basicly uses a gunbreaker all over the place. So honestly every job added has been hinted at. Look at the time line on websites date vs job release and you realize every job has little hints about them all over the place before the job is made. I mean Limsa basicly has a gunner guild (which sadly should have been added with duel pistols ... but they went with cids path of machines... which again is a hint.. I think the only one visually that never had a in game hint was Dark knight. But then again you can't have paladins without have their opposite be playable without pissing people off so dark knight honestly had to be added at some point so
so Honestly they have no choice but to add a hammer job at this point consindering how many characters outside Gaia has hammers visually being used diffently than a warrior fights..
And honestly adding Geomancer now is a must consinder the amount of tease the game does and the lack of a job that honestly focuses on all the elements.