Actually no, some people in fact have observed an increase in performance compared to before the patch. Of course, it came with the TEENSY TINY problem (disclaimer: tongue-in-cheek comment) of the Mac version of the game being rendered unlaunchable…
But on Windows? The performance is about the same or a little better depending on who you talk to.
Whenever an update causes a performance slump, there is usually countless threads posted by people complaining about how “unplayable” the game is with lower framerates. But that did not really happen with this update. Instead, the bazillion threads were about the Mac version breaking.
Which we did recently get an update that a fix for that is finally incoming after over a month, and at the risk of getting “gotcha’d” here’s the link to the Blue Post about it -