As you know to developing SLA application is very much time taking task for opensource but will surely add customer feedback section in near future.
IN next release we are adding two more features in opensource.
Agent Activity: https://www.uvdesk.com/en/blog/uvdesk-agent-activity/ Marketing Announcement: https://www.uvdesk.com/en/blog/uvdesk-marketing-announcement/Also IN opensource App section which will be paid:
Form Builder Custom Field