Played it. Performance was solid and did not jump up or down however, there was only 8 fps with the lights off and 9 fps with the lights on.
The walls still look jagged, however this is mainly (but not always), when standing still. When moving the jaggedness of the walls increases and decreases depending on the viewing angle. I should mention that the effected walls are only the ones that are parallel to the player and not perpendicular and additionally it seems to particularly effect two walls that are parallel to each other (hallways).
Otherwise all works nicely and the performance has improved in its overall stability but the frame rate can still increase.
Thanks for listening so closely to my feedback by the way. I am happy that my experience has helped a little :)