Pestilent pastures event doesn't correspond to the changes:

From the game:

From the mod's file:

I haven't thought to check if the text and the effect were off or only the first one.

And some events need to be modified the same than »Filthy Masses« was (an example):

And sadly, while compatible with challenges from event, the mod seems not to permit unlocking achievements.

I've little to play and might try to unlock one of my missing achievement, but I'll return to the mod without a doubt as soon as I get it.
Don't hesitate to tell me if you need more precise feedback, I don't like to comment values as I play very differently than most.