There were certain areas / situations where the framerate would just completely tank for whatever reason and afaik the release version was also pretty bad (I waited for a good sale though). One very notable one for me was when in the very beginning when you're supposed to go to the village for the trial as soon as you got close to the gate my FPS went into the single digits. No idea why, inside of the village it was all fine again but the way there was unplayable. Luckily you'd just had to run to the entrance.