I don't think you understand.
No one is blaming MS for slashing prices and undercutting the PS4. It's the fact that MS had to do it that's worrisome. Microsoft is most likely going win December as well but they're still going to be a distant second in the US, UK, and as we've already established, the world. So come January here's what we have.
Microsoft armed with the knowledge that they can't compete with Sony with equal pricing.
Sony ready to cut price the moment they want if they see the market heading in an unfavorable direction.
Microsoft looking at its next 11 months as a barren wasteland as far as exclusives go.
Sony ready to unleash Bloodborne, The Order 1886, and MLB The Show on to the masses.
No matter how you look at this market, Sony has things on lock down. The only way MS get's back in this is if they're willing to keep the Xbox One significantly cheaper than the PS4 and Sony, for whatever reason, won't back down from the 399 price point. MS just doesn't have the games to bring them out of this second tier they're in.