I think there is a big problem regarding the frame rates in dda. I did not notice at first since i was playing levels without too many monsters, but as i further proscessed through out the game i got a large framerate drop when i was playing nightmare and massacre.
I have a really high end pc with rtx 2080 and a ryzen 5 2600x. When i start a round i go down from 200 fps to 20-30 and sometimes lower. I think it ruins some of the fun since i can barely move. I have heard the problem comes from the game being too cpu based, but i am not sure.
I have not really spoken about this to other people in the game so i am hoping to get some response here about your opinions.