Just stumbled upon something over at bg3.wiki. Didn't try it, but seems you can use respec to farm legendary maces from divine intervention / arm the servant.
If you respec your cleric, the Devotee's Mace does not go away. If you have multiple cleric characters, or use Withers to respec a character who otherwise would not be a cleric, you can get multiple copies of the Devotee's Mace.
Exploit or FUN?
Just kidding. Seems like people are of the opinion that respeccing is outside of any regular game mechanics anyway (like save/reload is) and everyone just has to put on their DM hat to decide how and when it's okay for them to use it. In that sense it would be better even if the cost was reduced to 1 gold, so that changes to the classes/ability scores of companions are easy at the beginning of the game too (in case you want to play an origin character differently.)
Still, I think with a powerful NPC like withers respec could be provided in a way that feels more like regular game mechanics. (And personally I don't enjoy much putting on the DM hat while playing tbh.)
