From what I've seen (I don't have the game myself) the key point of this game is that it offers a platform to build on, with the main quest as a kind of "game sample". When they supply a proper support for mods and DLCs, there is a good chance that this game will really thrive.
We will see. The overall platform is not bad, and I expect it to grow. It all depends on how good they will expand on it. Minecraft was way worse when it started.