After further playing Subnautica 2 I have came to the conclusion that it sucks.
The publisher has made the decision to remove death from the game. I do not mean just through the story with human characters. Fish can't die, in 1 the wild life would attack, kill, and eat each other. In one they just hit each other a few times and part ways. You can not drop a fish inside a base as that would kill them.
And I blame the publisher not devs for this because the game has enemies design specifically with the intention of you kill them in mind. There is a small fish that swims in packa and alerts bigger fish to attack you. Clearly I'm supposed to be able to kill this but can't. Awful game.
The map is also very cramped, the biomes are very small and every 3 feet there is wreckage making the game feel a lot less interesting than 1. and the designers take up all of the good spots to build a base and fill them with giant destroyed bases.
I forgot the name of the ship but the one they have now is terrible compared to the seamoth. It has few upgrades available partially due to the removal of death.
The one improvement with the game is the base building. Pretty much the only improvement I am aware of.
All in all 3/10 don't buy