1. recognition & sign-in issues
2. recently-removed mandatory $100 add'l investment with XB1
3. Audio command usage is 90% of MS's currently-implemented functionality in-game (yet uses a tiny fraction of the physical space)
4. Kinect was hogging approx. 10% of the XB1's CPU power/reserve
5. Name 4 retail games for Kinect 2
6. Name 3 GOOD retail games for Kinect 2
7. No backwards compatibility or re-releasing of the handful of good games for Kinect 1
8. No XBLA small/mini/free Kinect 2 games like they did with Kinect
9. No Happy Action Theater (Kinect Party) 2
I have 24 Kinect games for the 360, all of which are anywhere from enjoyable to awesome (excluding free Haunt, that game can go roast a bag of marshdicks).
The biggest disser of Kinect is every single game developer, as they've all washed their hands of it for one reason or another...including Microsoft.