since they don't plan to add a new mudra, i doubt they will add new ninjutsu, since all the skill will be earned throught quest. why did we get a few ninjutsu skill at the time, was because they was adding a mudra.
at best (and i hope i'm wrong) we will get a quest every 2 level.... then at best we do have 1 skill not know.
and exept if they decide to add another mudra... we are doomed to see little to no change to the jobs... outside the positional, like they have said.