Isolate geometry visibility in the viewport when being masked with mesh masks in the asset texturing workflow.
Justification
This would make it easier to work on the specific mesh/submesh you are masking as well as give the artist access to areas of the mesh otherwise hidden.
Currently, you can achieve something similar using material sections and changing their visibility, however this is less convenient and may not always be viable depending on the assets material setup.
Implementation Details
Adding a toggle switch that would enable/disable this, and when enabled, as you click on layers that utilize mesh masks it would update the viewport accordingly (see similar in SP here)