So if this is true, and this is a shifting sands thing so it may not be the final word. Then the family tree is the same in effect as ordinary disc sharing. Each has it's own advantages:
Disc sharing: you can loan the disc to a total stranger, you can loan the disc to an unlimited number of people. If you loan the disc to someone who lives a long way away then you have to send them the disc, which is an expense and time lag and an inconvenience as you can't play while someone else has the disc, and if the disc is far from you you can't just grab it for a day or 2 and then hand it back. This trades off convenience for greater freedom
Family tree: Only 10 pre-selected friends and family can access the game (one at a time). If you have an 11th friend they are out of luck, if you make new friends, they are out of luck. One of the neat features of the family tree was the possibility that the owner and one other person could play at the same time, allowing for at least some online play with family. Without that the awesomeness factor of family tree falls away to almost nothing, IMO. This trades off freedom for greater convenience.
For me personally freedom>>convenience. I prefer the balance that already exists for disc-based games, and I don't see the different balance struck with family tree as an improvement, I see it as a backward step, as with all the Xbone DRM elements.
But this is a personal thing. The family tree vs disc swapping thing is not a case of right or wrong, or one objectively better than the other. They each have advantages and disadvantages and it's all about what's more important to you. If convenience is more important to you than being able to lend a game to anyone and everyone then Xbone is the console to buy if you were to base your buying decision on this one factor.
I've lent PS3 games to people who aren't on my friends list and even people who don't have PSN accounts. I definitely want to be able to continue doing that. I don't need another reason not to get a Xbone, but this is another reason why I can't really consider getting a Xbone.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix