It's a very valid excuse as the majority of the development is getting the game up and running. A lot of what you see in the game had to be created from scratch. Think of it like this, the game engine is the skeleton, the development process is what was needed to add the organs, the flesh, the nervous system, so on and so forth. Now that the new creation is walking, BW is working on creating "clothes" for it. The wardrobe atm is slim but over time it will be robust.