Once you get to the endgame a lot of loot that drops in early worlds is just clutter. Think of all the lower tier upgrade stones or the inferior potions and foods. It's not even worth selling them and those items just clog up the inventory. So what if you could click on an item in The Slab and "remove" it from the droptables until you turn it back on? I think it would make farming crystal mobs and early world resources a lot more "clean" imo
#Loot Filter in The Slab
gentle oyster
light breach
And more importantly those G bags from world 2 and even MORE importantly bandanas/shirts/pants/itp that makes your game lag after 5 mins of farming