I get significant (50% and more) FPS drops next to trees and it seems not CPU but GPU limited. Turning off AA doesn't help too much so its probably not related to the transparency AA.
http://imgur.com/a/95fRi
First picture the fps are about 70. GPU 99%
Second about 35. GPU 99%
If I go a bit towards the next vilage the GPU utilization drops and CPU now limits to the normal ~50fps Happened to me at different locations on the map. Always this certain types of trees. It was never an issue before the patch. These trees as well:
http://imgur.com/ke9BLWe
Firs have no effect.

0.36.115535 added bad performance in other areas as well. I could track it down to the shadow settings and if they are turned off there seems to be no problem at all(20 vs 80fps). Even lower setting helps a lot. Very high shadows didn't affect the performance nearly as much in the stable.
Update:
The ambient oclussion doesn't work anymore(no visable difference) however the performance is the same as if it is activated together with very high shadow settings. To get the performance like without AO you have to reduce/disable shadows completely.
Having shadows set to normal bringing better performance than before. 60(stable) vs 70fps(exp). Menue screen(same like described below). {F30271} {F30272}