Yea that part makes no sense. Hell I'd have been happier with the Joker and the Normandy making the ultimate sacrifice in the battle. I still wouldn't be happy because frankly, I'm sick and tired of all the fashionable trendy grimdark, but at least it would have made some sense. But I'm also tired of listening to the "we don't want a happy ending just one that makes sense" argument too. I agree that a grimdark ending that made sense would have been better, yes, but if I've made sure to make all the right choices in 3 games over 5 years then damn it yes, I want a happy ending and I don't care if it's not cool or edgy these days. If I want to get depressed I'll watch the news, not play a space opera game.