I suggest Alchemist can overwrite a proc on any crafted weapon, so people can change their dd proc MP weapons to lifetap with the new proc.
All that is lost is the cost of the inicial proc = low punishment for people already in possession of a lot of mp weapons on their toons.
Alternative Option2: Alchemists could simply be able to remove [edit: crafted!] procs from weapons and then apply a new one = the old proc can be reused - even tho i don't see why anyone would use dd procs from now on if they can have lifetap on lvl50 toons. - But it might be more elegant incase an Alchemist makes a mistake and applies a wrong proc on an armor piece or weapon in the future.
(especially for newer players the cost of replacing 2 or 3 MP weapons is huge, not to speak of assassins with 7+ switch weapons)
All that is lost is the cost of the inicial proc = low punishment for people already in possession of a lot of mp weapons on their toons.
Alternative Option2: Alchemists could simply be able to remove [edit: crafted!] procs from weapons and then apply a new one = the old proc can be reused - even tho i don't see why anyone would use dd procs from now on if they can have lifetap on lvl50 toons. - But it might be more elegant incase an Alchemist makes a mistake and applies a wrong proc on an armor piece or weapon in the future.
(especially for newer players the cost of replacing 2 or 3 MP weapons is huge, not to speak of assassins with 7+ switch weapons)