There's little I don't like about the X-Box One. Well, I'm a little disappointed that some of the early features got shouted down and capitulated on; game sharing could've been pretty cool, etc. And I wish Microsoft would push useful and interesting use of the Kinect 2.0 better -- especially on exclusives. The way it's used in Alien: Isolation sounds pretty awesome, for instance, and that's not even an exclusive. But that ship's sailed now that they've released a Kinect-less SKU.
I do feel like Live made a bit of a shuffle backwards. I wouldn't call it a full step. But it's not quite as intuitively easy sometimes to work out party formation and such. 3rd party apps' voice control is very hit or miss. The Netflix app used to be almost entirely controllable via Kinect voice commands (primarily using "X-Box, select" and then dictating the on-screen prompts like "More" or "Select 2"); I used to only need to pick up a controller for Netflix to enter searches on the on-screen keyboard. A couple months ago, Netflix updated their app, and now you can't voice command it for ****.
Navigating the core OS with voice works very well, though. The one thing it's not good at is picking up commands if somebody else is also talking. So if you're having a conversation with a friend, you need to either pick up that controller or orchestrate pauses in the conversation to switch to TV, or whatever.
Also, if you do go X-Box, I highly recommend purchasing digitally. I have no idea why my friend gets discs; the only benefit there is less downloading -- it still installs on the hard drive -- and then you have to swap discs to switch games. **** that noise.