Path of exile 2 0.2.0g introduces a deep revision to how item drops are calculatedfocusing especially on Monster Item Rarity, loot tiering, and guaranteed boss rewards. While previous systems leaned heavily on Item Quantity, this new approach prioritizes the quality of drops through refined rarity scaling.
Source: N4G PC Path of Exile 2 Patch 0.2.0g Massive Loot Overhaul, Rarity Buffs, and Endgame Rewards