I tend to think the start menu (in desktop mode) is still to wide. It shouldn't be taking up that much real estate IMO.
Having to reach to the top right for the power button is a pain and simplicity is often cherished. Most people hold tablets from the bottom right so I feel the power button in the bottom right...
Half the time I ask cortana a question, she doesn't respond, just a web links are returned. I notice Siri answers most of the time.
Not on my 920 (att), htc 8x (att), nor odyssey (Verizon).
MS needs to make some headway with banks. 2 of my friends declined WP, though they wanted a WP, because of their banks did not support WP.