If you really want people to give you feedback, then there are much better ways of doing it: Ask them for 1 data point at a time and given them the option to provide free form feedback with it. In fact, if you want to ask about different features, then ask a different question the next time.
Asking for Feedback
Manu Kumar

‘M’ within Facebook Messenger does a great job at this. Quick rating request after fulfilling a request. Conversational interfaces IMHO should make collecting free form feedback even easier, especially if they become a dominant pattern of interacting with services.