I enjoyed this game a lot! I think I had just about as much fun as I had with the original Subnautica, though there were also parts of it that I felt weren't as strong.
Below Zero is a lot more story focused. I personally liked the the story and the characters, but I do feel that a lot of the open-ended survival aspects that made the original so interesting had to be pushed aside in favor of them. The stakes don't feel as high since you're no longer playing as the lone survivor of a crashed spaceship trying to get off an alien planet.
There's plenty of nice QoL changes (pinning blueprints to the HUD, no longer being able to accidentally eat an item you're trying to put into storage). There's also some cool new base-building items to play with.
The environments are beautiful, though the map has been significantly sized down. Since you have to keep hopping around the map to progress the story, the feeling of "vast scary open ocean" unfortunately fades away somewhat quickly.
The creature designs are great! They have lots of charm. My favorites are the glow whales and snow stalkers. The leviathans are also really scary.
Despite the couple flaws, I really liked Below Zero overall!

Extremely fun speedrunning puzzle platformer shooter game, lots of the levels have very clever design though I felt like a select few of them were a liiiittle frustrating (especially when it came to replaying them to collect the gifts since some of them are bizarrely hidden or require you to do a lot of prepping / saving cards for later, side note I didn't realize you could press Q to switch between the cards in your inventory until around 15 hours in HAHA), it's still very satisfying once you figure out how to do it right though!
I personally had fun with the dialogue and story, but it's definitely not gonna be something everyone's gonna enjoy due to the writing style and pop cultural references (I had to do a double take when I saw a character say "pog")
But anyways I enjoyed it a whole lot, at some point I'll go for getting the Ace Medals on every level but not quite yet

HOLY CRAP Will of the Wisps was amazing, they took everything great about the first game and managed to make it even better! There's a lot more things to do here and I enjoyed the additional sidequests, collectibles, etc. plus there's a handful of new characters that are very fun to talk to. I honestly liked the combat in this game a lot more than I liked the combat in Blind Forest, since there's more of a focus on melee combat and a weapon system (and there's now some actual boss fights in addition to the escape sequences similar to the ones in the first game). Overall Will of the Wisps is really REALLY good