I respectfully disagree. When Microsoft releases Excel for the Modern UI it will be coded for touch. Number crunchers have been using the ten-key layout for over 100 years. When I am working on a spreadsheet that isn't too complex, I will definitely want to kick back on my sofa with my Surface sans keyboard. Microsoft cannot expect my demographic to relearn something that has been standard for so long.I still stand by my Community Post, the Usability Group went with the Enterprise/Social VOIP Layout as it is the larger audience. 10 Key for real input requires a physical keyboard, I use a Numpad when I need to 10 Key (I have a Bluetooth and USB versions).
Wow!! I've had my Surface since day one when it was released and never noticed the keypad went the other way. Then again I'm not a 10-key typer and almost never use the numeric keypad on my regular desktop keyboard. So in actuality I use the phone keypad layout way more than I ever use the standard 10-key layout. For me it works out great since I'm more used to that but can see how this would bother others and should be an option.
Can I get a name? Maybe I can plead our case via Twitter....Windows Phone head leads the entire Windows Client Team (Windows x86, RT, Phone and Xbox).