I’m not sure that it will. It’s either just end up as another source of passive damage that is ‘fire n forget’, or even worse - absolutely pointless as poisons don’t scale like Sin does.
For that, i afraid needs a buttload of work than just adding poisons.
From starters like giving alternatives to those forced-on pistol moves to the big elephant Roll The Bones - simply bringing poison back and stops there would be more like ‘i’m a pirate that now gets even dirtier’.