A7rm2 versus future A7rm3…find the difference :)

Franke Sanders (SonyAlphaForum) shared one single proposal for the new A7rm3. You may have found it by now on the picture above?
Here is what he writes:

From my point of view it would be helpful to have a joystick button at the place where now the AF/MF button is. For me this would be the right place where my thumb sits. I could use it to move the autofocus point, scrolling through pictures,….What do you think?