I understand this is already a recognized issue, but I still felt inclined to post:
My PC/GPU is a bit old, but I’ve always enjoyed a very smooth experience (over 1,100 hours currently logged). I have always ran the game at 2K (2560x1440) resolution at high graphics settings. And I’m fairly confident that the game has always ran at about 60 frames (unless Sienna). After this most recent patch, however, the game has been suffering from FPS drops in the high-20’s during hoards and, even when the FPS counter is high (when at the Keep), the game hitches and micro stutters at a rapid and constant pace for me. Reducing the games resolution to 1080p, and graphics settings to their lowest, does not remedy the rapid stuttering. And hoards still drop my FPS to the low 30’s to mid 40’s. I have tried to disable the Steam Overlay, but this also did not improve the stuttering. I have tried reinstalling the game. I have not tried to uninstall Microsoft Edge (mainly because I don’t know how). I have also never used mods. Honestly, the only time I ever really had noticeable performance hits was from some fire effects from Wizard.
Intel Core i7-4790K CPU
16GB of RAM
GTX 980 GPU
Windows 10 64
Game is installed on a SSD
I also just checked the system requirements on the Steam store page and it appears I should still be within system specs.