I've played almost 100 runs, and two of them have been ended by a pitfall trap. On one hand, its existence helps keep SPD a punishing, unforgiving game in the Rogue-like tradition, but on the other, instant death is always frustrating. What are others' opinions?
Not really. I would hate these traps if they were in sewers, but it's caves, by this point it's really unlikely that you have no options to deal with them. They give you one turn before you fall and you can use a consumable, artifact or subclass ability to get out of its range and you're fine