I didn't make any changes or anything, but the game is loading so much slower now. Fast travel used to take ~15 seconds at the longest and now it's taking around 30 seconds. Every other load time has also been about doubled. I've noticed that no longer do the tips and photos at the loading screen show up instantaneously, but rather it starts out a just blank screen for the first 5 seconds or so with just the little loading icon the bottom right, then the usual loading screen pops up.

I'm running the game from a Crucial m500 960GB SSD. It also has Windows on it and other program files, but there's still over 800GBs free. All my other apps and programs boot as quick as ever, as well as the system boot. I tried verifying the integrity of the game cache in Steam but it did nothing. Should I just try a fresh install? The load times are obviously still better than they were on my XB1 and on traditional HDDs, but it's just a bit worrying to me.

Thanks, as always, for any help at all.

You using the beta? It is a known issue.