It's one thing if it's a new IP that's exclusive, like Scalebound for XB1 or Bloodbourne for PS4. It's another when it's a 2 decade old franchise that was primarily single platform, went multiplat(which is fine), then went exclusive to a platform it wasn't originally exclusive to...right after rebooting on multiplat. Not cool. If it truly is full exclusive, I may skip it just on principle even though I'll have an XB1 when it releases. This is just bad business.
What if Gears of War 2 had been taken from Xbox, that would have been terrible, just like this is(assuming full exclusivity).