In 2015's E3 it was perfect. Pickups had their own glow incoroporated into the model tastefully. They all more or less did fit the world the game wanted us to believe. 

And then something happened. I presume multiplayer testers started whining and gamedesigners listened to them too closely. 

But even if, highlighting, outlines and shimmer - things blinking and being annoying to look at are needed. I want options to turn them off, OK? Please. Look at Dishonored2 - I rest my case.

This only makes me sure that devs think that you and me are stupid. =D I am probably right they really do think that.