I have been hoping they'd make branching versions of classes (Archer -> Bard or Ranger, Marauder -> Warrior or Beastmaster, etc) through the use of traits or new abilities but yeah it really seems like the devs are adamant on not making new jobs grow from classes. And OP you might want to take a chill pill on the people who are saying "the devs said x", they're just stating the reason why we don't have the suggested idea right now and why we might not have it in the foreseeable future.

Yes the devs can change their minds and someday might do so regarding this idea, but right now it's a "no" on all available fronts. It's not fanboyism to say such, honestly. The person may not really have an opinion if its bad or good or feasible or whatever, they just know what the devs' stance is at this moment in time.