I agree with Coglin on the fact that most classes will more than likely have multiple facets (jobs) that are just focused role players in a party environment. Classes will be what you level with for generic parties. Jobs will be something that you sit down as a party and decide who is doing what and put on that mantle to hit the field with for major events where more focused roles will be needed.

My concern is, are they even going to bother expanding on the jobs after they are introduced or are they just going to make up more and more jobs while introducing more classes to attach more jobs to.