Here's a big thing for me personally: In an earlier run of ST I was vote kicked from a party after the loot from Amon dropped and before the final boss was engaged. I was vote kicked because another DRG in the party was also after the body drop. After that happened to me, I stopped passing on loot until the group started the next boss just to be sure it wouldn't happen to me again, and once the next fight starts it's easy to forget to pass. I know I'm not the only one this has happened to either.

It's a QoL change. You can say all you want about people having time to pass or lot, but thing happen or people have their reasons.

Bottom line - making it so that loot that is NOT rolled on falls to the floor instead of automatically going to someone hurts no one and has the potential to saved someone from a wasted week.