Adding effects directly to video layers (Audio Track Mixer for Video layers)

Being able to add effects directly to a layer which makes all clips on that layer affected would be a huge time saver.
If you have a multicamera sequence with 3 different cameras where you want to add same grade to all clips on track 1, track 2 and track 3 seperately.

Or even being able to make adjustment layers only affect the clips on the layer directly beneath would also be amazing... (like in photoshop)