Hi,

It would be a huge timesaver if we had a View As function (similar to over on Dashboard Builder) in Sharing Groups so we can easily identify each group that a particular user is in. Now, we have to go into each of our groups and look at them one by one to see where a user resides. 

In this enhancement, you would be able to search for a User, once the user is selected, all Sharing Groups would be shown in the filtered list. See image below.