If the "failure" of Mass Effect 3's final minutes has done anything, it has proven exactly how successful the rest of the trilogy was.
Fantastically said, Daniel Floyd, if only there were actually people who didn't realize how amazing the series had been up until that point. Even the best whiskey, perfectly aged in the greatest of oak casks, can have a soured opinion if the aftertaste leaves you wondering if they slipped in some rancid horse urine there at the end. Congratulations him on completely grasping the thing that made us all so angry, then saying that he wouldn't talk about it.
No closure, no account, no affirmation, and an ending theme completely disjointed from the rest of the point of the narrative would make anything fall flat. They want to end it on a bleak note, great, fantastic, it's their option as creators. People can ***** about that all they like.
Know what else would have proven how successful the trilogy was? If it had ended efficiently. Does anyone think Star Wars or Lord of the Rings would have been improved with a botched ending, where we could say "Wow, what a great series. Except for the ending that was so crap it threatened our memories of the rest of the trilogy." No. There's no call for an ending so messed up, when everything else in the series has come together to be an actual, honest to gods
epic, a tale of impossible odds, of victories and deaths, of noble sacrifice and of heroic deeds.