The ability to add a logic to survey questions, text fields, and other elements. The idea is that the visibility of these elements would depend on contact properties or other questions. Also different versions of a question would help a lot.
For example, I could show a certain question to only our partners and not our customers. Or hide some questions from contacts based in Switzerland.
Another example is that when someone answers 9 to a recommendation question, a follow-up question could be to tell us what they like the most about us. But when they respond with a 3 we should ask them what we could change to improve their experience. This could be stored in the same property field (e.g. “Recommendation comment”) which would then be easier to read in a report.
Qualtrics and many other survey tools do this and it helps a lot with increasing the response rate, as every survey is customised to the respondent.