I felt robbed when the pick pocket perk gave me a 0-1% chance of stealing a weapon, even up to level 4.
So I modified how the game factors weight into pick pocket chance, and bumped up the minimum chance of pick pocket success to 10%.
Install:
Navigate to ..\Documents\my games\Fallout4\, open Fallout4Prefs.ini, add the following under [Launcher]: bEnableFileSelection=1
Navigate to ..\Steam\steamapps\common\Fallout 4\Data\ and put “Improved Pick Pocketing.esp” inside.