Given the nature of cross skill abilities and the ease of switching to the new jobs once you meet the requirements, I see no reason why people wouldn't want to level an off class first. Truth of the matter is that people are going to have to level that cross skill class at some point, why not just do it right away?
Maybe a PSA post needs to get made for new players going into Heavensward. Hrm.
Maybe a PSA post needs to get made for new players going into Heavensward. Hrm.