On noticing that this post mentioned surveys, I feel the need to share my experience with a recent survey I got in client. That survey did focus a lot on content as well.
The problem I had with the survey is that it would give you four options, and ask you to rate one as the most frustrating and one as the least frustrating. You did not have the option to not answer with a particular grouping if you wanted to complete the survey. I felt like this led to a distortion of answers, where I would have to identify something as most frustrating, even if none of the options frustrated me.
Appreciate the feedback. Those surveys can feel a bit weird to fill out. They are a really effective method of generating a ranked list of things like favourite champions, points of frustation, motivations to play etc. A single person's responses can be misleading, aggregating thousands together however produces a really useful result though.