I know the title is a bit click baity but hear me out.
I’ve seen this complaint over the years in a few different arpgs where people feel like loot slows them down and can be missed sometimes with certain builds. For instance you might hit a pack of monsters with a DoT and move on knowing they will die. Currently you wouldn’t know off screen if an exalted item dropped from them. This means some builds you have to sit and wait for things to die just to see if they drop anything.
The solution already exists in LE. At the end of an echo you have a reward chest. My suggestion is to disable loot from individual monsters and instead increase the drops from the reward chest at the end. Maybe do something like a slider that shows the player tiered rewards based on how many monsters they kill, so they know while in the echo if they care to keep killing or leave.