Yes, that is very much just the state of the game at the moment. The preview was designed to feel complete and functional on it's own. In due time the final game will regain that feel, but right now things change so much it's simply not possible to obtain that "comfortable" feel.
It will be like this for some time, at least until the steam release, as I won't make that release until it reaches the same "comfort" as the preview. I do not have an explicit date for this.
Look forward to many updates though!