Switching between two different cameras with different control layouts etc helps to slow one down. A person cna get used to many things. I believe that the pop up magnifier is very handy. I believe the left to right reversal is very unhandy when working quickly. A prism is less handy for focussing due to both brightness and magnification but it does get rid of the left to right reversal. While you can improve your technique with the Hasseblad it is unlikely that it will ever become as handy as a motor driven auto focus 35mm.