I don't mind the pace of the progress (got plenty of games to play) - but this does tell me we're really far out from a release.

It's not just that only half the classes are available at this point - this current system - especially the UI (i.e. the level up menu, etc), does not take multi-classing into mind at all. Meaning even once they implement all the classes, they'll need also go through tons of changes to implement multiclassing.