Had a little go at Fallout 4 on the PC again yesterday. I turned the Godrays off to see if it would help with the stutter, but it had absolutely no effect at all. It still looked amazing though, the light flashing through the trees as you looked across the wasteland. It's a beautiful game, I just can't get my head around why the character facial models are so abysmal!
I'm not sure what the frame rate drops are all about. I set it back down to high, but other than a lower low, the average frame rate doesn't seem to affect performance at all. It's just random drops and stuttering, at times when nothing taxing is happening at all. Hopefully it will get patched, but I've cranked it back up and I'm sticking with 50fps at Ultra. It's easily playable enough at that.
But I am trying to love this game. I think with a bit more time I will actually get the hang of all this scavenging. I'm slowly getting used to the PipBoy (though you shouldn't really have to!) and when I do I can actually see myself enjoying this game a whole lot more. I've changed (toned down) the colour on the PipBoy as Timey recommended, and that helps a lot.
The slow movement when you've picked up too much stuff is way over done though. Really annoying!