Yah the Lucky Feat is usually banned from most games because it's so broken. Sven alluded to inspirations as being rewards in BG3, maybe given for completing quests (maybe a whole quest line devoted to helping the gods?) I think it acted just like the lucky feat in the gameplay, but maybe it was auto 20? I'll have to rewatch it.
Giving players multiple chances to roll though, would be tons easier than trying to balance every encounter for easier difficulties and it fits.
