Metrics are great but they won't tell you the user passed on your software because you're missing width/height info on selection
Similarly it seems easy for metrics to mislead you into thinking the most important features for your app are the ones that get the most usage. It could easily be that some other features users would like far more but are currently hidden or poorly designed so that users are avoiding them
Metrics can't answer every specific question directly. But if you look at the kind of activities your lost users performed last, and find a surprising amount of, for example, "Select", "Undo", "Select", etc you will know you have a problem area.
Similarly it seems easy for metrics to mislead you into thinking the most important features for your app are the ones that get the most usage. It could easily be that some other features users would like far more but are currently hidden or poorly designed so that users are avoiding them