Currently, the equalOdds setting is semantically identical to usePersonalLoot, which is now the default setting virtually everywhere in the game. For that reason, the existing config option and database entries should be updated to reflect this change.

Right now, the description leads the reader to believe that equalOdds is exceptional and thus will rarely be set. In reality, it is now the expected default behaviour for every item that uses the groupSize field.

Unfortunately, renaming the field has some side effects. All existing database entries need to be migrated to use the new setting, and the localisation phrases should also be updated (minor changes are all that is needed).

Right now, I don't have time to do this, so I stopped the refactoring after adding all missing equalOdds entries (see warnings printed when running /rarity verify for custom items that still use the outdated settings).