To be honest, I think the main concern for some is probably just the classes. If the new classes (for whatever reason) are stationed or move to 2.0 area (say Dancer gets a new expansion room in Ul'dah, Redmage perhaps in Limsa) then I assume most worries and concerns will be gone. Kinda how the initial class change was done and being level 10 first, lock these new jobs to level 30. 50-60 class quests in HW areas and finally 60-70 in Ala. However, I do agree in locking the new location by the story but classes, I'd assume that would turn a large number of people excited to jump in and play a certain job, only to find they have a LOT to do (or cutscenes to skip) to get to it