Whatever they did, it no longer gets quite as high FPS with the dll file it did pre-patch.

Where I once got 55+, I know get 45. I used to be able to walk from where Cobb is standing to the saloon and it was 60+ FPS. Now it's 50, 45 when I get to the saloon. (Were it was 55 FPS.)
Still better that before the dll and patch, (A lot more 20-30s then.) but a bit of a downgrade. I can even remove the dll and it's the same as before, just my second GPU reports no activity like with it.
Kinda wish I had left it in offline mode. :shrug: