Subnautica seems to be performing better these days. Picked it up for peanuts a couple of years ago, always put off by the choppy frame rate and a UI that would float around on will. Most of that would cause severe motion sickness.
Fired it up a couple of weeks ago to a much more pleasing experience, smoother ocean, a static UI, and a PDA that is more readable than before. Not quite perfect, now I've started building a base you can still see some frames dropping.
Turning out to be the fantastic game people make it out to be, amplified 100% in the glove fit of VR. Met a leviathan for the first time yesterday, utterly chilling experience. Swimming around in shallow waters I was totally unprepared, no idea about the roar, I saw the huge shadow and it darted at me like a flash... I've never been that **** scared in a game before. The alien in Isolation has absolutely nothing on the Reapers in Subnautica, I think the huge scale of the creature and the isolating nature of the diving suit with nowhere to run saw to that.
Great game, but be warned not for the faint hearted, it's Jurassic Park up close.