Endless Ocean Luminous is fucking great. If you liked the Wii games, are an ocean life enthusiast, or wanted to do more exploration in Subnautica without having to worry about oxygen or Minecraft type bullshit, I cannot recommend it enough. After finally getting to spend some time playing it after reading the negative reviews I can say the game journos that didn't like it are fucking retarded.
It is cozy and laid-back and perfect to chill out to. The complaints about "it puts too much emphasis on multiplayer" are fucking stupid because you don't need to carry or rely on other players, unless you're dead set on finding the rare creatures which can be kind of challenging--you might be on the other side of the map but you can just warp to the player that found them. The only thing I agree with the journoscum on is that the story missions are ridiculously short. It's usually just "go find this creature" and the creature is not far from you so they can be finished in a few minutes or less, and then you have to unlock the next one through other dives. Which isn't that terrible, because I just wanna dive for God's sake!
The other annoyance is that you have to buy new suit colors, stickers and emotes for a ridiculous amount of in-game currency. But they're purely aesthetic, so it's not that big of a deal.
I'm really enjoying it and it's bringing back pleasant memories of the Wii games. One of my core memories was playing EO2 and swimming in the depths in pitch black, and turning around to see a fucking giant whale swimming straight down behind me. I've never been jumpscared by a video game like that since. I got pangs of nostalgia when I was playing Luminous a few days ago, just swimming and looking at some fish when I heard a whale song bellowing through my Switch. I turn around and there it was, swimming not far behind me.
Another time I started a multiplayer session and was dropped in the depths for the first time--I hadn't even found it in my solo dives yet. All the crazy deep-sea fish I love and even extinct creatures just there in the blackness. A whale fall and a sunken ship at the bottom.
TL;DR: It's just a really good game.
edit: ALSO like 30 minutes ago I was on a multiplayer dive with someone named "Sneed". That really brightened my day.