So I believe Bungie changes weapons in all of the wrong place- specifically range. Thorn, TLW, shotguns could all be balanced nicely by shortening up their range.
Thorn's impact, poison etc are all nice and balanced.
I believe the exotics shouldn't be changed into being unusable like what was done to auto rifles and fusion rifles. Just remove perfect balance from certain hand cannons and shorten the base range on the. Shotguns need to have range taken way down.
Red Death is a big ol ' counter to Thorn at the moment.