Doctor_Jackstraw wrote...
I actually dont really see all that much wrong with the logic of the endings truth be told, and as I said, I would love to have a solid list to just pick apart. (it would be a fun challenge)
(sorry if I insulted you) 
As far as the moral implications, Theres one interseting thing I want to bring up about the destroy ending:
When I first played the game I picked destroy and said "Well i dont want to kill the geth kitties but its the only way to make sure this gets done, even if i get wiped out too" During the breath epilogue I was really surprised. When shepard survived my immediate thought was "Maybe the geth survived too?" This was the AT THE MOMENT of completion on march....i believe i took 8 days to beat the game so it would have been 14th while avoiding all internet and social activity.
Fast forward to extended cut. If your EMS is high enough the line about the geth dieing is REMOVED from starchild's speech, its still there if your ems is low enough (i believe the cutoff is 2800?). Now, while the geth dont have a slide in this ending, if your first experience with the ending IS the high ems destroy ending you would actually have no reason to think the geth were dead. nothing in the ending supports this other than a missing slide (you also miss miranda, jack, and the rachni queen's slide in most high ems destroy endings) Only those of us that played the game at launch would think "The geth died in this ending" without doing extra research. (which is ironic because my first analysis of the ending at launch was that the geth must have miraculously survived if shepard did too)
I just thought I'd bring that up.
You asked, and I'll answer.
1) Shepard adds absolutely nothing to bring about control.
Shepard replaces the Starchild, and orders the Reapers to "Stop, and help rebuild" That is the entire basis of control the Reapers stop harvesting, start helping in the rebuilding. He just replaced this guy, and gives, two orders.
What exactly changed? What did Shepard bring to the table with his "power source"? Did he add the words "Cease and Desist" along with "Rebuild" into the dictionary?
He added nothing of any significant degree that justifies the need for him to die for it. Its the equivalent of just talking the catalyst down and convincing him to stop.
2) Synthesis:
This ending has you create an entirely new DNA structure (Catalysts own words). In other words, genetic manipulation, on a galactic scale. This is an incalculable number of
cells of which the genetic structure in its entirety has been re-written in a matter of seconds by something labeled simply as a 'power source' a 'power source' constructed by civilizations technologically inferior to the antagonists that have frequently been held up as the pinaccle of technology.
You achieve, in little more than three months construction time a result that this race of infinitely powerful machines simply could not achieve after multiple attempts, even after knowing of the existence of the crucible.
3) Destroy:
As far as the Destroy ending goes its the one with the least amount of issues, the destruction of the geth however, is one of them.
The geth have been described frequently as purely software. The reaper tech upgraded that software.
This is no different than a patch.
If I upgrade Skyrim 1.08, and then downgrade to upgrade 1.5 my skyrim will still function, same for every software upgrade. Remove the upgrade, the machine will still perform, just not at the same capacity it was achieving with the upgrade.
The red wave targeted reaper tech exclusively otherwise every piece of technology would have blown the hell up. So its safe to say that the only upgrades that would have been affected within the geth are the reaper upgrades, not the geth software itself, so all of them dying was added as little more than the writers "feel bad for this" option, to "balance out" the choices.
And here's a list. Three things you can pick apart, there's more but this should give you enough to sink your teeth into.
As for the Geth's death not being included in the EC high EMS outcome that's a good catch, hadn't really noticed that one myself.