Yay, Nurse Ratchett - beautifully put. It’s no big secret: Use what data you can get (advisedly); use what user feedback you can get (advisedly).
And “advisedly” applies to both. Eg maybe your feedback does show that they used one particular feature more than others, but, oh I dunno, maybe the other features were too complex for them to understand, so they abandoned trying to use them?
The best way to get user feedback is not just to log them, or listen to them, or even to watch them use it, but to watch them use it having asked them to speak aloud their thoughts as they do. You will learn ten times more about what is wrong with your product this way (and it will stagger you what’s going on in normal users’ heads - that sure ain’t your System Model that they’re working to).
As a designer, not a coder, I have an alternative headline for you:
*** Do Not Listen To Your Techies. ***
because what techies (and marketers, and…etc) think is a good idea at the UI/feature level usually isn’t, until you have an idea of what is really going on in normal users’ heads. Turn yourself into a half-decent designer by finding out: spend some time doing this spoken aloud user test with some normal users (using your early version, or using competing products, or whatever relevant that you can get hold of). It will change your life - and, hopefully, the lives of your future users.
Of course, few self-respecting techies ever do this - you’ll typically just say to yourself “yeah, sure, but I’m not that bad, I think I understand normal people pretty well, and we do get user feedback, so, no problem, continue as before”. Mean time, normal people are having a truly horrible time with technology, and just hanging in there doing whatever they’ve managed to get to work, too scared to change or add anything in case that breaks their current tenuous usage.
Snappy headlines are the order of the day, so I can’t go with “Do Not Listen To Anyone Who Doesn’t Sit Through Some Spoken-Aloud User Tests In Order To Discover The Real World Of Users”. But since 90% of the people who design and affect the UI/features of tech products are indeed techies, and who don’t do this, let’s go with it again:
*** Do Not Listen To Your Techies. ***