The new leviathan sounds are nice and all, but they completely kill the atmosphere. Personally, I think you should make the game much scarier. Since players can’t even kill the creatures, the lack of real danger turns the experience into a pure sandbox mode, removing the survival stakes and that special tension the first game had.
Right now, Subnautica 2 feels just like a game where you build underwater bases and nothing more. It has become way too noob-friendly, with fully guided gameplay and absolutely no fear factor. It feels like there is no care for creating a true challenge anymore.
I really hope you consider adding an option before starting a new game to tweak these settings. Even if it is not the default option, please give veteran players a way to toggle off the guiding elements, change or disable these new creature sounds, and increase the leviathan hostility. Part of the community who loved the first game is really missing that terrifying, unguided survival experience.