The box, the DRM, media integration, etc. means nothing if they lose those subscribers to the Wii U or PS4. So, don't piss off your core customers.
Anecdotally, a lot of my friends and family who are longtime Xbox gamers have no intention of buying a $500 DRM laden Xbox 360. Removing a lot of the DRM restrictions still doesn't fix the price and now Microsoft already looks a bit foolish for not being very customer friendly in the first place.
The "console war" is a long game, but Xbox One didn't start out on the right foot for sure.