Have you tried deleting all your AMD driver files using DDU ( http://www.guru3d.com/files-details/display-driver-uninstaller-download.html )
followed by a reboot and then installing the newest drivers?
Still doesn't work. I get the DXGI Error less now, but now I'm betting an engine error: Couldn't create texture for various textures. Error code is 887a0005
Bumping to get another response
Bumping again because my problem hasn't been fixed.
That's not good. Seems like you might be running out of vram maybe? Maybe try setting texture quality to low to test? And the rest of the things to try here: https://forums.titanfall.com/en-us/discussion/5166/titanfall-2-troubleshooting-faq#latest
