I was playing 'Dogfight - Even' mission last night and played it today (post-patch) and I'm getting a performance hit... 8-10 fps less and more micro stutters when flying low.
EDIT: cleared cache and defragged game directory and fps drop/stutter remains.
I'm still getting blocky water

(nVidia 430 GPU) other than that it all looks great, I assume performance will probably increase over time as code is optimized.