I would like to see some type of built-in system that will randomly send out a survey once a ticket has been marked resolved. Currently, you have the option to have a survey go out EVERYTIME you resolve a ticket or when the agent elects to add a survey. In our industry, we have customer's that email us 20 times a day; if they got 20 surveys, we'd be lucky if they replied to 1.
Add randomized surveys when a ticket is resolved as well as give the agent the ability to still add a survey. I think this will even the playing field for an agent, instead of them just electing to send a survey whenever they think the customer is in a good mood.

