Maybe add links to codoforum's documentation, forum and blog in backend.
More detailed stats on how many joined, posted etc within a date range with graphs/pie charts.
Details of how much has been sent via mass mail, ability to pause/schedule sending etc, ability to force send weekly or daily digests...

Details of how much has been sent via mass mail, ability to pause/schedule sending etc

We have been thinking about this.

ability to force send weekly or daily digests...

Not sure if it is a good idea ?
Can you give us any cases when this may be useful ?

I intend to send weekly or monthly email s in the future, eg pick a summary of interesting threads but only one link in email, Quora does the same,/similar I imagine others do... It will help with user engagement?