Magic find bar that fills up as you kill ennemies to affect end boss

Hi all!

I really like the game and i want it to stay in a healthy state but i strongly believes that going through monsters to open chests and then go to the end boss isn't right. An action rpg is actually more fun when you're killing monsters because it promote many different gameplay style. That is the case if the most efficient way to get gear is not to actually go through monsters.

So how to encourage killing monsters?

A good way would be to get a Magic Find bar that fills up as you kill monsters that would affect the end boss of an map/dungeon. Could also affect golden and obsidian chest within it! 

I hope that something alike it gets implemented, seeing many streamers on twitch going through monsters is actually boring and unhealthy for the game/community.