I personally think classes are done for. My hope was that they would use the expansion to resolve some of the awkwardness and criticisms of the overall class, job and armory systems. It appears that won't happen.

However, rather than be removed, I think they will stay. From a lore standpoint, they still make sense. New characters wouldn't be 'awakened' or 'aware' to any of the jobs and their existence. New characters also wouldn't be skilled enough to even explore any of the job paths yet.

Mechanically, they are still awkward. Yes, classes have better solo-ability, but my experiences show each current job is solo-able enough that many players don't even bother switching to the class when soloing (that could change with Heavensward).