It seems they're adding jobs that fall in line with the storyline. Based on the FFXI precedent, Samurai makes sense - but don't see where the fit in the current state of the storyline (maybe we'll learn more about the Au Ra in 3.0). They made Ninja fit within the context of the story. The Crystal Tower storyline has also hinted at the Dark Knight. I think some take on the Gunblade weapon makes a lot of sense as some posters have mentioned. It would also make sense from a design perspective in the attempt to further establish FF14 as its own beast and not something to be overshadowed by FFXI.