The only problem I have with the ending (aside from the fact that it's awful, doesn't fit into the game thematically, and is deus ex machina to the extreme) is that if you think about it for more than five minutes, everything about it falls apart. It doesn't make sense in the slightest and it's proof that Bioware didn't put any thought into the ending at all, and that upsets me more than the actual quality of the ending.
The rest of the game is absolutely fantastic, and that's why the lame ending is such a slap to the face.
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