For anyone with the blurry textures: Steve said to set your texture settings to low, click apply, then set it back to ultra. That fixed the issue for him.
Unfortunately, that didn't fix it for me, but it's still worth a try. I have found out that low, medium, and high settings still work as normal, so if resetting the textures like Steve said doesn't work, try setting them to high. It might not be as good as ultra, but it's 100x better than the broken mess they are now. But Steve and the team are looking into it so hopefully a fix will happen soon.