I just thought I'd spell out a little better what I was talking about a couple of pages back when I said said ME3 should've had Shep winning not the crucible/catalyst - I was in a bit of a rush yesterday so didn't have time for more than a couple of lines.
When I said that the entire series was about us beating the Reapers, I didn't mean it was literally about Shep blowing up hundreds of them single handedly, but that the overall story has always been about Shepard beating them. Not alone, not without help, but it's Shepard who defeats the Reapers in ME1. It's Shepard who defeats the Reapers in ME2 (you don't destroy any Reapers, but you do defeat them). For much of ME3, its Shepard who defeats them. That is the essence of Shepard - standing up to the immposibly powerful, fighting them and winning. And then, come the ending, it's the Catalyst who defeats the Reapers. To me, it's as if BW suddenly decided to deconstruct the image they'd built up of Shepard, by ultimately making her powerless. And while I love a good deconstruction, you don't suddenly shift to one in the last 15 minutes of a 100+ hour story.
Now, of course, even with the united resources of the galaxy, a straight up engagement with the Reapers at Earth would've not gone well. Which is there The Crucible should've come in - it should've been a MacGuffin that gave us the ability to fight. A weapon. A power source. Something that meant, at least temporarily, the Organics had a chance to fight the Reapers. As an example of how to do a MacGuffin well in the type of story ME was prior to the very end, well, look at ME1. The Conduit was needed, without it we couldn't've have won. But it didn't beat Soverign for us, it merely put us in a position in which we had a chance of winning. We still had to fight. Shepard still had to take down Saren. The human fleet still had to destroy Sovereign. That is how the Crucible should've worked (obviously I'm not saying it should've literally been another mini-mass relay, but in terms of its place in the story). That would've been in keeping with the rest of ME. That would've given us, the players, the chance to act, to feel that we'd accomplished something - core to the experience of a game like ME - rather than just picking a colour and letting the creepy kid do it all.
Instead, we got something that just ended the entire war just like that. It trivialised everything we'd done over the entire game. All the fighting, all the victories we won, all the friends we'd lost and it just comes down to a MacGuffin ending everything with a colour.
In a completely different story, one where we were powerless from the start, this would've worked. But in Mass Effect, where, from the word go, we were standing up to the impossible and proving we weren't powerless, it was utterly the wrong ending.
To take this one step further, I don't think the ME3, that the Battle of Earth, should've been the end of the Reaper War. It should've been the end of Shepard's story, it should've been the turning point of the conflict, but it shouldn't've been the end. The Organics win a massive victory, the Reapers are forced to retreat, but they retain significant forces. The war continues for years, decades maybe. Billions more across the galaxy die. But after Earth, the Organics are winning. The Reapers certainly have local triumphs, they win battles in the future, but Earth was their high water mark. Never again would they come so close to overall victory. Ending such a massive war in a single battle, let alone a single instant like the Catalyst does, is to me, an utter waste. Wars, especially those fought over such irreconcilable positions as those held by the Reapers and the Organics, don't just stop because one side wins a battle.