I know you (Turbine) wanted to make poison as a different damage type relevant ... did you intend to make it the most dangerous trap type in the lower-levels of the game?
I mean, sure everyone used to ignore them - but you may be a bit out of whack on the balancing between the other types ... unless the invisible lightning is a feature to make it more exciting and challenging too ...
They do make for some lively runs, I'll grant you that.
If you want to tune up the other trap types, make cold damage traps cast Sleet Storm and acid to also proc an Earthgrab (take that FoM) effect mid-trap. For fire, make the heat actually precede the visible flame - you know, like a heat wave - so it's harder to avoid with keyboard skills.
I've been lucky and successfully avoided most of the shame, but been on a number of runs lately where I'm carrying an unusually large amount of soulstones and my poor back is hurting.