I had another delusion I needed to share.
Thinking about how borderline useless poison/burn/curse effects were before Koyanskaya of Darkness, I realized that they could have actually rolled the "Arts/Buster/Quick vulnerability" package of debuffs into the poision/burn/curse paradigm. It would have fit quite well! The colors could even have been adjusted a bit.
Were this the case then obviously it would look something like this...
Burn --> Buster vulnerability
Poison --> Quick vulnerability
Curse --> Arts vulnerability
These are the ones that feel most thematically appropriate. In fact, they feel thematically appropriate enough that it almost surprises me this wasn't done.
I suppose just another notch in the belt for DW in terms of missed opportunities.