I think part of the problem is we don't really understand if there will be any changes to the current status quo in regards to Classes and Jobs. As it stands...
1. Equipping a weapon makes you an associated "class"
2. Equipping a job stone makes you a "Job"
3. "Jobs" are tied to a particular "class" and therefore a particular weapon/magic skill
4. Because a "Job" and its associated "Class" rely on the same weapon/magic skill, they share the same levels (leveling 1 is equivalent to leveling the other).

So, here we have 3 incoming "Jobs". But apparently, none of them are associated with a given class and will start at level 30. Is this going to be a case of mechanics that are done "just cause" or is the plan to actually rework some of the class/job systems? And, in the future, if classes aren't being rethought, when does a job get a class and when does it not?