Alright... Since everyone is posting their thoughts about misses and sliderbreaks, I'll say mine:
Shortcut "A": we should assume the worse happened, because it's not possible to determine where or why it happened, exactly.
Stamina: Stamina is not streaming, but a sliderbreak doesn't mean you lost stamina, it means you missed the beggining of the slider, but you still clicked. Misses should affect stamina, because "A". Accuracy shouldn't affect it, because the number of clicks in the end can be the same for low and high accuracy, if there are no misses.
Tenacity: Since it measures streaming, a sliderbreak shouldn't affect it at all, but misses should, because "A". I also think low accuracy should matter as much as misses here, because "A".
Agility: Both Sliderbreaks and Misses should affect agility, because any miss or sliderbreak is a lapse on aim. Accuracy shouldn't affect it.
Accuracy: uhhh accuracy should affect it, obviously. Sliderbreaks shouldn't affect it, since timing on sliders isn't calculated currently, but misses should, because "A".
Precision: Both sliderbreaks and misses should affect it, same reason of agility. Not sure if accuracy should affect it or not, so no opinions on it.