1. Home button to get to the location of the mxd when adding data, saving data, etc.
2. Statistics right-click function for attributes.
3. Default gdb button to get to the default gdb when saving, exporting, adding data etc.
https://community.esri.com/community/arcgis-ideas?sr=search&searchId=79aa6131-7b9a-4053-b99e-159ec86... usually gets their attention.