But its not always a case of just putting it all on the disc. Companies who do dlc right release it as what it is: additional content developed after release to add stuff to an already finished game. Would you have rather paid 16$ for Mario kart dlc, or 60 for Mario kart 9 with a few added characters and the tracks from the dlc? Even new CoD games are essentially things that could have been dlc on another previous installment. Now on disc dlc, I don't like. Nor do I like day 1 dlc. If its ready on day one, put it on the disc as part of the game or an unlockable.
I understand the concept, but I'm 40, so I'm rather fond of the old days where you have a hard copy of your game, as opposed to having bits and pieces of it also stored on your WiiU hard drive... which Nintendo will eventually cease to support someday, thus flushing all that property down the drain once your system is dead.
The least the companies can do is offer an unlock key to the system and some basic tools so you can back up and modify your system as if it were hacked, or at least to the ability to fully backup your content and install it offline. Crap they could possibly do that now, but I'm sure they are afraid of risking the system's security.
Also, having own computers since the Atari 400 days, I love free software, I love to be able to make my own stuff with game engines, and I love free MODs from the various game communities. DOOM in itself could be the only FPS I ever owned in this respect, but there is so much more. As I see it, companies now a days with their on-line centric game consoles, are just nickle and diming that concept, but without the spirit you find backing many projects created not for profit, but out of love.