My idea for how it should all have gone down in functionally similar to the actual ending. The big change I'd make would be to throw out the Destroy and Synthesis endings as is, and go with the Control ending. It's the only one that made sense to me, seeing as it can do everything Destroy does with less collateral damage and Synthesis was just stupid. Refusal is unchanged.
In the end, you are able to use the Crucible to seize control of the Reapers. The final choice comes down to how you would wish to use that control. This will also be affected by the kind of player Shepard has been up to at this point.
Your choices would be:
1. Command the Reapers to destroy themselves immediately by flying headfirst into the middle of the nearest star. (Destroy)
2. Take control of the Reapers and endeavour to use their technology and knowledge to usher in a new hyper-advanced age for all the species in the galaxy. (Synthesis)
3. Take control of the Reapers and use them to secure human dominance over all other life in the Milky Way. (Control)
4. Stick to his/her guns and reject on principle the idea of enslaving a sentient race and refuse to use the Crucible in any manner. Attempt to take on the Reapers by conventional means. (Refusal)
=Fleshing out the Differences=
From this point, the consequences of these 3 (or 4) choices could be further mapped out by actions the player has taken previously in the game. For example (this is not an exhaustive list):
=Shepard?s Death=
If Shepard opts for either the Synthesis or Control endings, he/she must sacrifice his/her body to do so as it requires a full upload. Shepard dies.
If Shepard opts for Destroy, survival is possible. If the Geth were saved, and Crucible assets are above a certain threshold, then Shepard is able to briefly upload into the Reaper consciousness to deliver the destroy order and come out again seriously wounded, but not dead, due to the Geth knowhow on melding organic and synthetic consciences. As a boon to DLC purchasers, the same could also be possible if the Geth were destroyed - if Crucible assets are at a higher threshold and the player saved Dr Gavin Archer with his work on Project Overlord. Whether or not he/she survives depends upon how quickly people can reach him/her afterwards, which would be determined by war assets and how many ships survive.
If Shepard opts for Refusal, everybody dies.
=Mass Relay Destruction=
War/Crucible assets could also determine how efficiently the Crucible?s power is unleashed. With assets over a certain threshold, the power is focused enough not to blow the relays as the signal passes through them.
Player actions that could modify this:
- Siding with the Salarians over the Krogan lowers the threshold as the Crucible is better made with the Dalatrass?s scientists on retainer.
- Similarly, knowledge gleaned from saving the Collector Base helps focus the signal.
- The Crucible may take too much damage to function properly if there aren?t enough ships in the sky because only one of the Quarians or Geth were saved, Alliance ships were sacrificed to save the Council etc.
=Aftermath=
Some ideas in no particular order:
- War assets determine the state of destruction the galaxy is in after the battle for Earth and how long it takes to rebuild.
- Paragon Shepard manages to maintain an uneasy harmony in the Synthesis ending, or if he/she suddenly turns around and chooses Control, the galaxy is unprepared and is subjugated easily, but also unites more readily against him/her
- Renegade Shepard can?t keep the peace in Synthesis and conflict breaks out over control of Reaper technology and in Control mistrust of humanity means that the rest of the galaxy is more prepared but also more fractious.
- These and the Destroy ending are modified by Shepard?s actions with the Krogan, who could become your greatest ally or enemy depending.
- Shepard may or may not be offered a seat on the Council, and may or may not accept it.
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This is the ending I would have liked. But, with the Extended Cut, I can at least accept, if not actively praise, the end as is.