Controls for changing individual layer colours in the docked scene explorer panel. The same way layers can be coloured in Photoshop.
Ability to select a layer and/or objects in that layer and change the layer colour with 'change object wire colour' as an option.
Coloured layers display should able to be toggled to display /wire-colours-only/layer-colours-only/both/ as options.
I hide/unhide layers often, it would be useful to have the layers themselves colored so they stand out and are easier to identify, especially when importing hundreds of CAD layers that are similarly named. Idea could be developed to assign imported data to new random layer colours etc...