It would be a nice feature to send scheduled issue summary reports to only those that are assigned an issue (within the report). This way a trade partner only gets a scheduled email report if there is an issue assigned to their name.
Bonus points if one issue summary report scheduled weekly could send out individualized reports to each issue assignee (only showing their issues and hiding the other issues not assigned to them).
This would help cut down the number of reports people receive as well as phase in and phase out trades who come and go on the project.