If you open multiple dashboards in workspace, you can only see the type of filter/search you have open. Therefore if you have many "Request" searches open, you have to click on each one to see what the filter is. In Classic View, you would see the a number of the first characters in the search criteria and if you hovered over the tab title, you would see the entire search criteria. This is helpful and saves times if you are comparing multiple fullview dashboards and/or searches.

Additionally, it would also be nice to see what dashboard part is opened in workspace. Unless you "Edit search" and change the search/filtering criteria from what the dashboard part originally was.