Option to add additional questions or ratings to CSAT

We're finding that limiting CSAT feedback to just one question is limiting, and it's hard to get a sense of agent performance as customers aren't distinguishing between the service they've received from the agent and, for example, their opinion of our product. Adding additional questions to CSAT would allow us to differentiate between the two. 

There are numerous apps in the marketplace that offer similar solutions, but these often come with unnecessary bells and whistles and a hefty price tag. Simply adding additional fields to the native CSAT survey would fix this.