Irrespective of your loot preference, Blizzard themselves in their D2R survey that they sent out asked for player feedback in having personal loot instead of FFA loot at D2R launch. This is an undeniable fact.
David Brevik who was President of Blizzard North at the time and the game director for D2 & D2:LoD has stated that changing to instanced loot would not fundamentally alter the game and has stated on multiple occasions that with the clarity of hindsight he would remove the stamina bar, add auto-gold pickup, and change to instanced loot if he could go back and fix things.
Some link to David’s comments are here:
Comment in Favor of Instancing loot and Removing Stamina Bar - Diablo II: Resurrected / General Discussion - Diablo 3 Forums (blizzard.com)