It would be nice to configure various "system wide" settings (users can of course override with their own settings in their home directory). An example I would like to adjust is the refresh frequency. Right now, it seems that the default values are hard coded in mintUpdate.py, to timer_minutes = 30, timer_hours = 0, timer_days = 0.
This used to be configurable in /etc/linuxmint/mintUpdate.conf