On the topic of icon shape that @siracusa @marcoarment & @caseyliss have been discussing on #atpfm:
I learned through creating some throwaway icons with @Sketch that if you just take a 1024x1024 square PNG file & toss it into Xcode, the squircle is automatically applied. I wonder if there's some issue with doing this, or you couldn't do it before, or people see the template and assume you need to apply that? Maybe @flarup knows?

Possibly, changing icon shape could be minimal work for Dev’s.