If you seriously believe a MW Longbow+Mw Bodkins deal 68.08 pierce damage at 6 powerdraw, than you are deluded.
Dear god you're arguing that the mechanics are wrong without showing any testing
at all. Basically you're saying "it's wrong because i think it's wrong" rather than "it's wrong and here's the data to show why'.
No one is going to discuss balance with you when you say "this isn't true because it doesn't
feel right." Either provide cold hard data that contradicts the current data, or stop pulling threads out of the sky. You're like the guy who says climate change is a myth because it snowed last winter right now. "Oh, i just know its wrong- no need to provide any proof!"
As i said, people who know little about mechanics (or at least this specific mechanic) discussing mechanics making bold statements with little actual fact backing them up do nothing but harm the balance in this game.
In my opinion on how to nerf crossbows:
Stop them from going through shields with out breaking them and killing people.
In return make it so crossbows are not affected during bad weather.
I wouldn't say this would be unfair, but then again it would take away the uniqueness of the crossbow a bit the one ranged weapon that forces shielders to dance a smidgen (and then only on lower level shields). Plus rain lowers most xbow damage so much that they can no longer achieve piercethrough, sort of creating the exact effect you're looking for. I have a +2 xbow with +1 bolts and i can barely pierce a practice shield in the rain.