It would be cool to have a column in our exports that shows the average time of engagement by user/session in our exports. I think we've received this request a lot for the trivia use case, but it came up with Pepsi for a survey use case.
It is definitely a nice to have for them - they could see it being valuable to look at an individual user and see their average time of engagement with their surveys over time.
They have an integration setup, but my main POC does a lot with our exports so it just be another value add to our reporting capabilities