I think people are forgetting how fast it is to lvl up in this game, took me 23 days from EA to finish 2.0 storyline, with watching cutscenes, so 30 days roughly to complete up to 2.55.

In FFXI to unlock advanced jobs you needed to get to lvl 30, which took about 1-3 months depending on your playstyle and when you joined game (later expansions made it faster, as I'm sure later XIV expansion also will).

Biggest roadblock I see is the storyline duties, but Yoshi already said they are going to add feature to allow us to queue into duties with parties of less than 4 with Heavensward.