I have just watched the video that went into the guts of the new XB1 controller, and mentioned the 40 improvements. Progress is great, and I am happy to have seen more detail on how the controller has been improved. That being said, I am still disappointed that Microsoft did not allow for the 360 controllers to work on the One. If the One controller is so much better, I think people would want to migrate to it, but to be able to use the 360 controller would have been a really nice option to save people a little bit of money. Sure, Microsoft is not in the business of saving people money, but this would have been a really nice, goodwill gesture that I think would have been a good thing for them (and for us, the consumers) overall.
The most obvious reason for this is that MS would like to not lose that additional money from the sale of all the extra controllers, and have to put additional time and effort into some sort of compatibility mode for the 360 controllers. Another possible factor, maybe they have seen what happens with their operating systems when people are not forced to upgrade to them (poor adoption rate, overall failure), and they didn't want that to happen with the new controller? I don't know, but it still really leaves a bad taste in my mouth that I made an investment in wireless controllers for the 360, these controllers still work great, and they are similar enough to the new ones for the One that they should be able to be compatible with the new system. OK, so each stick won't get me feedback, and the Kinect (which I won't care to buy anyway) won't recognize when I pass my controller to a friend -- that is OK as a sacrifice for me if I am wanting to use a 360 controller to save some money. Especially since I need to keep my 360 for a decent period of time anyway, with the games not being playable on the One.
Not looking for any flames here, just sharing my thoughts, which are heavy with dissatisfaction in this one aspect. It, along with the incompatibility with my handful of really good 360 games that have still not been played yet (and no support for them on the One) has held me back from purchasing a One thus far. I didn't get a 360 right away either, for the same reasons of the games that I still had, and that they would not work on the 360 at first (over time, many of them did)... But at least there, I could see why the old controllers weren't supported and didn't want to use them anyway (no wireless, different / non-USB connector, etc.).