While I haven't been watching development lately, Epochtalk isn't Bitcointalk. Epochtalk is the generic name for the new forum software Bitcointalk commissioned. For an apt comparison, Epochtalk is like Default SMF. Once the work is done creating the backbone, Bitcointalk will be built onto it. What you are seeing there is the default that anyone will be able to take and customize to make their own forum. The orange isn't a theme, its just a placeholder. Styling work will be done last or near last.
I haven't been keeping up with the developments either was wondering though if we had a rough idea of where we are now in the development cycle and how much longer it will take, seeing how this has been an ongoing topic for a damn long time, I was wondering if we are going to be done before the next Bitcoin halving.