Wow, so this is now pretty much a completely different system from when it was unveiled. As shitty as their initial vision was, I would have respected them more if they had stuck to it. At least partially so. All the changes they have made are most likely smarter business decisions, but it gives me the impression that they are radically redesigning everything in a relatively small time frame so they can be competitive with Sony during the holiday season. Hopefully all of this isn't as complicated and rushed as I'm imagining because this paints a picture where we could have another disastrous launch for a Microsoft console.
This is pretty much how I feel.
Microsoft having a Kinectless SKU at all seems to go against their plans for it. No developer in their right mind would even give two shits about it if wasn't standard with EVERY Xbox One. The only way to get some potentially interesting games out of it (keyword: potentially) is by forcing it into the homes of everyone who buys one, whether they want it or not.
They wouldn't develop exclusively for Kinect anyway. Just like how you said "no developer in their right mind" would limit their userbase (to those with just Kinects), they similarly wouldn't wall themselves into just releasing on one platform when they could easily release on two or three. The existence of the PS4 makes compelling Kinect games something that will likely never happen, or that will be incredibly rare.