Tying game logic to framerate? I know that's actually still fairly common, but it feels so 00s.
The framerate being used a timer or what is still prettymuch a semi-common thing (I know it was a DPS issue in Destiny 2, lol).It's really hard to explain. I may have been a bit over my heard from feeling so frustrated with the game. The only advice I can give is to try the demo yourself, and if possible on your platform, change the framerate limit.
The other thing with capping the framerate is also just consistency. Leaving it uncapped is down to the whims of whatever your hardware can pull off with whatever is going on the scene. And our monkey brains learning the visual cues at 120fps vs 103 fps vs 60 fps vs 98fps as it flip flops around might not be conciously recognizable, but will screw up any learned reflex.