When I saw the Halo 5 trailer, I honestly thought right up until the end that it was a Prince of Persia revival, and I know I'm not alone.
As for the "demos being behind a paywall," read the statements from execs at E3 about taking a game to a friend's house, logging in, downloading the game, and then the friend being able to buy the game after an hour. If they were on the family plan list, what would the point of this be if they had unlimited access? It was right in front of us the entire time. They were being deliberately misleading with their statements.
That was entirely in regards to the system being offline for an hour outside of your main console and had nothing to do with the sharing plan (which to add: as described to me it was actual complete game sharing and not limited like cboat is suggesting)