Personally I don’t see how locking these jobs behind the expansion will really hurt the game. Ninja was only unlockable to all players who had completed the envoy quest at level 15. Basiclaly if someone really wants to be Dark Knight, Atrologian or Machinist then they will simply level as required to unlock it.

FFXIV isn’t anything like XI in terms of levelling and as the leader of an FC I have seen new players pick up levelling and questing rather quickly and getting to 50 in no time at all.

I remember, I don’t have the source to link, that these jobs are ‘advanced’ jobs which are why they are only unlockable in the new content. As we don’t know anything about them we can’t really speculate too much but the fact that they all start at level 30 initially points me to thinking that perhaps they involve certain mechanics or something and as someone else said we don’t know how exactly the new jobs will be unlocked.

Also going back to the mass craze that was Ninja levelling. DF times on my server were abysmal and selecting all languages made no change to the times what so ever because vast majority of players were levelling NIN. Imagine what it would be like if newer players could all level Dark Knight/Machinist/Atrologion on day one of expansion….