It would be useful to have a widget on the Dashboard that answers this question: How many new (unique) subscribers did we get during a specified date range?
"So, how many new subscribers did we get this past week?"
Currently the two existing Dashboard widgets do not fully address this.
The "Recent Updated Lists" widget allows a specific date range but doesn't tally them and does not de-dupe.
The "Subscriber Summary" widget shows a de-duped total, but you cannot specify a date range.
The only way to get this data as of now is to create a segment and refresh it every time you want new data (and/or create a corresponding Data Journey to automate).
I'm not sure if a new widget is in order, or if improvements and modifications to one of the existing widgets mentioned above is the solution.