OK. THis is after playing both versions.
V 0.1.8 is beginning to place in a story. although loading to any checkpoint kinda removes all progress... and the gameplay is far worse than 0.1.5, as the environments are minimalized and unused.
However, I assume this is just until all the content and features of 0.1.5 brought to 0.1.8's story is done. I see the vision, but the old version is nicer to play RN.