They are still committed to Bard by Release as far as we know. I agree that any other Classes are not likely until after Release.
We're also still waiting for our last 3 Races. I really want my Dire Lord to be a Skar. And if they get Wizard working more smoothly, I want a Gnome Wiz.
Thats why its listed as Future classes. This is way later, hoping first expansion ties into that large frozen continent north of our current continent. I would like to see a Barbarian race possibly added into that with frozen waste and snowcapped mountains. Of course good time to introduce Bezerkers.
As to Bards, my Fav class. Just hope they do them right.