It is not so much about being locked in, and more keeping in mind this is a side project. Roundscape Eclipse is the main focus, and this will result in further delays to Starmaker. There is still a load of rework to be done, which will hopefully be addressed through 1.8B. Then 1.9/2.0 can be all about building new content to flesh out the gaps and conclude the story.
It is good to be optimistic, but do expect delays. It is better to wait a while for a good game, than a quick buggy uninspired one.