Layers / Keep non-focused layers at full opacity

This is more of a feature request or conversation, but I welcome other thoughts about this. I know what I’m asking for can be worked around (hence the “workaround” section below) so I’m not looking for suggestions as to alternative ways to do this. 

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Context: Running a collaborative workshop.

Use case: Putting activity frameworks and other read-only assets on a locked layer and using a separate layer for collaboration so that participants can’t move objects that should be fixed.

Request: When focusing on a layer, do not change the opacity of the non-focused layers. Non-focused layers currently change opacity so they’re barely legible and not usable for a workshop. I understand your rationale for wanting to make them more opaque, so perhaps an opacity toggle would address both needs.

Workaround: Without this ability, I have to lock every object I don’t want people to edit. This is doable but tedious, especially if I want to edit those items myself.