I noticed a lower framerate too, which was already quite low to begin with since I'm playing below minimum specs.
However, it also affects supercruise, where I could get between 50 and 60 FPS even with 1x supersampling with the previous update, but between 40 and 50 with 0.75x supersampling with the new update.
It seems to drop based on the direction I'm looking at, but regardless of whether there's something or not in that direction, so it could be the new lightning that somehow is more expensive when the sun is behind the ship, or something like that.
Anyway if we consider the fact that this patch's optimizations aren't supposed to affect performances outside of settlements and stations, there definitely seems to be something wrong here.