A bunch of my mates who were already in on xbone are gutted about this too.
I'm ready to dicth the discs and go all digital, the old way would have ment I could shop around for the best prices instead of just the Xbox store.
I hope places sell codes.
I would have liked it to be an option you loose trade is you apply it to your library, you loose online if you join family sharing etc.
The xbox UI was made for all the games to be there too, game switching instantly, matchmaking one game while playing another. Hopefully that stays with DD but get ready to get up and change your disc.
For me it's a shame, I hope they can keep some 'features' moving forward with DD.
Oh and no way to I buy that 45min pastebin limit in thats been put in the title.