Just small IN GAME survey 3-5 question survey. Example being "What would you rate this patch overall 1-5" or "In brief message please tell us what you would like and didn't like in 120 characters or less".

Of course the survey can not be answer by everybody.Example being if you haven't put in the time for said "content" the survey would ask a different question.

Another example on how the survey would ask player is by looking that service account time spent on the content its asking for. If you haven't clear the newest primal and put in the time to try and clear it . The survey would ask you about your experience with a multiple choice or short answer.

I feel this game will greatly benefit from surveys at the end of every content patch.