No, the plan was always to release new biomes during the Early Access period (scheduled to last 1 year). For free.
For those wanting an honest opinion, it's good fun, with some frustrations - building is enjoyable and we're given an interesting setting. There are bugs and so on, but it's Early Access, and the devs are communicative and are tackling issues. If you're interested in playing during Early Access and contributing, I'd recommend the game. If not, wait until the proper launch next year and see what people think then.