The XC seems to be a bit of a tweak of the XT. (Albeit I never used the XT; I am just going by what I see and read on the systems.) So perhaps they are trying to generate some quick cash with a minimal investment by getting XT users to buy a second XC body?
I have to agree with you here though. Mirrorless is the wave of the future, and we can only hope that behind close doors they are working on something.
Given my work, I probably would not be interested, but a lot of people would. What I am more worried about is Phase One remaining competitive and solvent, so I can continue to get service for my back when I need it.