They do spawn both, it just seems the skunks are more plentiful than the fangbeasts... for now.
What butterfly can we get? I've searched my game high and low but am not seeing any on offer.
Oh, and though I snipped it for brevity's sake, I did appreciate the points you brought up about the chests. Looking back on past issues and what little we've learned of the company, your ideas are likely more accurate than not.
I know they've said that it takes several events before feedback-induced changes are seen in our games so I'll live in the hopes that we'll see the chests fazed out. Fingers crossed!