I'm really trying to get it, but I can't seem to be able to.
Guys, the whole game is about the Journey.Each player made his own choices throughout the game.So comments like nycmode75's "seemed to directly contradict whatever Shepard was fighting for the whole time" seem rather moot, since that's what HIS Shepard was fighting for.That's what nycmode75 got from the story. That's his own point of view, his own experience coloring his view. His own choices.
The Catalyst doesn't tell you which to pick, he gives you three choices. It's up to YOU, the player, to pick which choice sits the best with your developed Shepard.Have you been constantly Anti Geth, throughout the games? Or maybe you're just the ultimate Renegade, the baddest ass Nay Sayer? Then you'd probably pick Destruction (I'm just throwing off the top of my head), just to watch things blow up!Have you put your trust into TIM or gave him the Collectors' Base or feel megalomaniac enough to think you can control them? Then you'd pick Control.Have you tried to make peace with everyone? Got the Geth and Quarians fully cooperating? Tried to walk the middle ground and actually believe that this can all work well together? Pick Synth.
Yes, the "just pick one" sort of "game play" is quite underwhelming.But those who immersed themselves in the lore and developed story and empathize with Shepard, will probably want to choose the path best suited for their developed character.
What I mean by underwhelming in regards to the "Pick one" thing, is that even though on your first playthrough you'd probably want to pick the one best suited for you, the other options are just a Post Cerberus Base save away.It does kinda take the edge off of it. You don't need to replay the whole thing to pick the other things, just restart the last mission.
But overall, the major three options are quite fitting.
You guys can say the option is absurt or unrealistic or disgusting.
Maybe so, but it's a choice.
And it's not without precendence in the game.
The Geth/Quarian cooperation gives some small inklings into that "possibility", if you took to Tali after that whole endeavor and she tells you about how the Geth are helping the Quarians with their immune system, by residing in their enviro-suits.
That coupled with the fact that pretty much everyone in the ME universe has some sort of implant or another (from Biotics to Omnitools to prosthetics and so on...), there is indeed some direction there.
Only major problem is, again, the abruptness it happens with. Or the immediacy.