Except Steve wasn't a designer and he knew that. We all know Jony Ive, his work, and have watched the videos that put the spotlight completely on him and his creations. Did Steve have a lot of input? Definitely. Was he spending weekends tweaking AutoCAD files and making prototypes? No (at least, not that I know of). Delegation is a huge part of good management, and it is a skill that Mayer has shown to lack on numerous occasions.