Having been able to dodge all spoilers before playing the final release version of Subnautica, I could not imagine subjecting myself to a playtest or early access of Subnautica 2. Below Zero may have been a disappointment but I'd rather take the chance of discovering that for myself than risk ruining what could be a once in a lifetime experience by trying to play it before it's finished.

For me, the best part of Below Zero by far was seeing it grow and change over its development cycle. One day I would discover a new feature and then a week later it would be much more polished, and another two weeks later it would have moved to a different place and be revised again. That was a once in a lifetime experience, too, and to me it was much more fun than the finished game. I'm glad I did it this way, and I hope it will be a similar experience with Subnautica 2. But of course I can see that there's a good chance it will just be an unfinished game with lots of spoilers.