I'll admit I'm by no means aware of the status of these weapons on all classes but I'd hope there wouldn't be a huge issue here from a balance perspective. I'd also encourage (again, if possible) that 1h weapons are made unique-equip on dual wielding classes to stop doubling up on the best available procs.
Open to feedback and being flamed

EDIT - Another possibility might be to implement an NPC where rewards which have previously been selected can be 'traded in' for a different reward - a gold/medallion and/or losing the talisman(s) you've slotted would seem a fair price to pay