As a german, I see this as a step in the wrong direction. The sharp S is a PITA to begin with, so I'd rather abolish it completely. Now there's a whole bunch of complications coming from this - how do I type this? To type lowercase "ß", I press the key above "p" (in the same position as with qwerty) and "ü" (to the right of it), which will do "?" when pressed together with shift. So do we move "?" somewhere else? QWE…
This is why I switched to a US layout a few years ago. Mac in particular makes US layout pleasant to use with European languages. Want a funny S? Hold S, pick what you want. All these are one longpress, and one num key, away: ß ś š