Make it clearer who has access

I think Group Folders seem to be a very good feature however I also have a big issue that I think is a minor fix.

If I set up a group folder, lets say I add the Groups:
Sales, Legal and Board

I want only Board and Legal to access some folders, for example with employment contracts. So I press the Share button of Employment Contracts subfolder and I want to make sure only Legal and Board will have access. I then add Board and Legal and give them full access to this folder.
Now I realise I also need to add the Sales group and Deny it access, fair enough but here is the problem, this is too complex, if I forget about the Sales group they will have full access and I will not even see them in the list. Also if I add another User Group to the group folder in the future it will have full access to these restricted folders.

One way to make this more clear I think is if the Group Folder permission list of a folder would always display all groups added to the Group Folder. The ones that only inherit permissions could be greyed out instead. But this way you would at least immediately see and understand who has access to a specific folder.

Start at the Group Folder permission list for a restricted subfolder and reproduce the case with Sales, Legal, and Board groups. Trace how inherited permissions are represented in that list; the work is done when every group assigned to the Group Folder is visible and groups with only inherited permissions are distinguishable.