Nemesis - You misunderstand my point. It's not that
Spoiler:My point is that putting in a purely happy ending after the fact, which many people DO want, as in, Shepard literally retiring on a beach somewhere with his friends, would be disastrously stupid and ignoring the tone of the game. With everything working out perfectly, without any repercussions to the actions of the game. It would be a hideous and dishonest ending. That's my point.
Shepard MUST die in order for the ending to be tonally sound (though in this case it makes since it is heavily foreshadowed). Hell, Shepard can already survive with enough war assets, so I have no problem with the prospect of him living.
Also, your simplification of the ending is cute, but like many of the arguments against it, it ignores the nuanced implications and ideas presented. The Reapers are not normal synthetic beings. They are a hybrid of organic and synthetic. Their innards are that of organic creatures, millions of them. This would allow them to reasonably not consider themselves synthetics.
As far as your complaint about the unification of the Geth disproving the entirety of the catalyst's claim that synthetics will inherently rise up and destroy organics doesn't hold water, logically speaking. One instance of Synthetics allying with organics for a matter of weeks isn't strong enough proof to deny that what the catalyst said may still be true.
There's no reason to think that the Geth won't later turn against organics again. In fact, the reveal that they have individualized their perspective means that they are likely to begin making decisions similar to that of a regular organic, including eventually aggression and the desire for power. Also the Geth aren't the only instance of synthetics rising against organics. It's a major theme in all the games, and it happens in various ways throughout the series - from the Project Overlord DLC, to Javik saying very sternly that in his time Synthetics attempted to overtake organics, to various rogue VI's and AI's that show up throughout the games. What the catalyst says in regards to Synthetics inherently going against their creators makes perfect sense upon inspection.
GK - The game's ending already is grimly victorious. You achieve victory no matter what, but no matter what their are massive consequences, as there should be. If they change the ending and keep the tone intact, and address other problems raised in the ending, then I'd be perfectly fine with that
The only reasonable complaints about the ending stem from various plot holes and obvious oversights made by the dev team - such as EDI somehow surviving the 'destroy' option, and the squad mates that you took with you during the final attack somehow being back on the Normandy after being with Shepard in Harbinger's blast, and so on. Everything else is knee jerking or people just being unhappy that the series is over, and taking their unhappiness out on the game that ends the series.