I don't see why you want Spider wings removed from the droptable. They're related more to Kolodion being a spider than to a h'ween event.
Pumpkin lanterns are rare enough. These were never meant to be oldschools, doesn't matter that they offers similar cosmetic value as the lit-bug lantern. Oldschool rares will always have their place in the economy, no matter what.
You should rather compare them to christmas rares. If you compare the christmas rare and new h'ween rare quantities, you'd see that we actually have less rares this halloween than we had on christmas (estimated).
I do agree that it doesn't belong in Kolodion's droptable and technically we could swap it with another rare item, but that's not the right way imo.
Also such changes will never be public, otherwise you'd just stockpile them and wait for offers.
For that reason, this suggestion made it less likely to happen. You can only blame yourself.