8.) Always online
When Microsoft revealed the "always online" functionality to consumers, all hell broke loose since not everyone has a stable Internet connection. Even if you do, not everyone's speed is fast enough for the Xbox One to perform at its best. This also ties in with the no used games restriction since this was how they would authenticate the games.
Adam Orth, an ex-executive from Microsoft, resigned from the company after he tweeted out his controversial opinion for the rest of the world to see.
You'll be happy to know that the company has since revoked this functionality, but the bitterness will always be there for some players.