@swampthing I was having similar issues with the pre-order beta, and setting Memory to "default" while Texture and Object to "High" and turning off PIP solved it for me.
Here's the settings I'm using now and getting good textures as well as FPS, you may want to give it a try just in case:
Doesn't realy change anything for me. Although it seems like texture detail doesn't actually change the resolution of textures, it just seems to be extending the distance that the normal texture is drawn out away from you. There seems like there's only two levels of textures, one really really low detail and one low detail. I've yet to see a single sharp texture anywhere in the game except for the flyable helo's. Really just kinda shocked that everything is this low res in this day and age.
It's not really that huge of a deal i guess, as i'm still having fun, just really taken aback by how low res everything is.