Casey Hudson said:
For the last eight years, Mass Effect has been a labor of love for our team; love for the characters we've created, for the medium of video games, and for the fans that have supported us. For us and for you, Mass Effect 3 had to live up to a lot of expectations, not only for a great gaming experience, but for a resolution to the countless storylines and decisions you've made as a player since the journey began in 2007. So we designed Mass Effect 3 to be a series of endings to key plots and storylines, each culminating in scenes that show you the consequences of your actions. You then carry the knowledge of these consequences with you as you complete the final moments of your journey.
That's possibly the worst method of storytelling I've ever heard. It amounts to "A bunch of big things happen, and then the ending happens completely independently of those things."
Look at how ME2's endgame worked out: the actions you made throughout the game, practically from start to finish, determine whether or not Shepard and company make it out alive. Characters whose loyalty you didn't earn might not die, but other people whose loyalty you
did earn might suffer as a consequence. Essentially, the foresight you put into the mission actually affected the mission. You either planned it well and got to watch (and play) a brilliant plan going off without a hitch, or you missed key details and people died for it.
Casey Hudson said:
We always intended that the scale of the conflict and the underlying theme of sacrifice would lead to a bittersweet ending-to do otherwise would betray the agonizing decisions Shepard had to make along the way.
But this
wasn't a bittersweet ending: it was the mother of all implied holocausts with a side order of plot holes.
And even then, what's the point of forcing players to make "agonizing decisions" if it's all just going to accumulate in one massive agonizing decision? All the sacrifices, sadistic choices, and moral dilemmas were supposed to make the ultimate resolution (if players earned it) that much more satisfying. As it stands, some of the most loved figures in the series died so that Shepard could, no matter what ending is picked,
destroy the universe as we know it.
Casey Hudson said:
Still, we wanted to give players the chance to experience an inspiring and uplifting ending; in a story where you face a hopeless struggle for basic survival, we see the final moments and imagery as offering victory and hope in the context of sacrifice and reflection.
So, the ME3 endgame...spoilers, obviously:
Shepard is dead. Pretty much no matter what, unless you opt for the 'genocide of the machines' ending. The most charismatic man in the galaxy, who made water run uphill, is dead, and in doing so, he made the Reapers go away and blew up the mass relays.
The mass relays exploded...each of which presumably detonated with the same force as the one that was just broken in
Arrival, which looked like a sun going supernova. So let's be conservative and guess that a few billion died there.
Wrex and a few million krogan are stranded in Sol. The best future for Tuchanka is cut off from the bulk of the krogan race, who likely aren't bound by the genophage any more. On the bright side, maybe they won't create another nuclear winter with all the WMDs they canonically started to break out when the Reapers invaded, at least now that they've awakened a nightmarish death-worm big enough to crush a Reaper to death.
Victus and a few million turians are also stranded in Sol. That's basically the government and military of Palaven, cut off from Palaven. They share a problem with...
Tali and a few million quarians are
also stranded in Sol. Like the turians, they don't eat the same food that humans and krogan do. In fact, human food is essentially poison to them. So they're stranded like everyone else, except everything they didn't bring along themselves will be about as safe to ingest as Draino. And Tali will presumably die, never having done more than setting foot on her homeworld.
A few million geth are around, too, and Rannoch is probably the best-off world thus far. But simultaneously, they'll be coping with the new development that is complete sentience on an individual basis, and with the inevitable issues that come from being a purely synthetic race in an overpopulated solar system alongside millions of organics who remember them as the ones who frequently helped the Reapers a few years back.
The asari...well, their world is screwed already. And now it's faced with the biggest humanitarian crisis in galactic history, and nobody will be there to help them.
The crew of the Normandy is stranded on a lush jungle planet with no way of getting off world. And in sci-fi, 'lush jungle planet' is just a way of making a deathworld into a viable tourist attraction. I expected that if they don't starve to death within a few months, they'll be devoured by thresher maws. Because there are always thresher maws.
Oh, and virtually everyone has Reaper corpses everywhere, and if canon has taught us anything, it's that dead Reaper are more dangerous that live Reapers, because creeping insanity is a lot harder to detect than screaming laser death.