I'm fine with the PHB classes. They can even take another couple years before releasing.
The only thing that I'll never understand is the releasing classes and updating the first act sets them back on finishing the game... all of that is part of the final game, yeah? Like I've said a hundred times. They need to prioritize getting the base stuff out first since it can all impact later act layouts, world building, quests, etc.
Narrative, quest branching, general planning and locations can be done in reverse, but everything else?