I think the class names do need to be changed. The OP mentions this isn't FFXI but XIV and that's true but those jobs names were not for XI they were Final Fantasy jobs that started in the beginning of the franchise. Those jobs(and the abilities that go with them) have been present in every single FF. Even the games that didn't have the jobs themselves like Final Fantasy VIII still had hints of them in there.(Abilities were still named the same as they were from the jobs they came from and Quistis Limit break was being a Blue Mage).

Those jobs and their names are part of what makes Final Fantasy Final Fantasy and it's that reason I think they should rename the classes and many of the abilities to be more in line with the rest of the franchise.