Highlord Heian wrote...
If this is the case, it's more or less as big, if not a bigger, cheat than the ending we see.
We were promised a conclusion. Promised answers. Promised an ending that depended on our choices.
What we got was still a rushed, non-interactive slop bucket with three colors of goo. Even if you can excuse it with the "Indoctrination Theory", it's still the ONLY ENDING. No variations. Your choices mean absolutely nothing to this shallow ending they've thrown at us.
Paragon for three games? Renegade for three games? Doesn't matter! Same ending.
And this upcoming DLC, it packing a "real ending" would be such a sincere insult if they dared ask people to pay for it. Indoctrination or no, people want a real ending. They want more than ONE ending.
The way I would create this if I were a dev, would be like this:
This IS a test of Shepard's will and there is NOT just one way to wake up. The destroy ending would be the easter egg for those who chose to carry out what we, as Shepard sought out to do in the first place. If we picked the others after the "real ending" was released, we would be woken up by squadmates. You go along through this last mission fine and dandy. The defining moment happens when you reach harbinger. For the sake of storytelling, let's say there is the killswitch or something in front of you.
1. Picked Destroy: You are able to push that killswitch and things go smoothly (given your EMS is high enough. If it's not, you sustain very high casualties.) You save the day and live happily ever after (or something less rainbow and cotton candy like.) More details, but you know, you get the jist of it.

2. Picked Control or Synthesis(High EMS): You struggle to push the button due to Harbinger's influence. Somehow one of your squadmates snaps you out of it and you are able to push the killswitch (Rainbows.)
3. Picked Control or Synthesis(Low EMS): You struggle to push the button due to Harbinger's influence. IF you have high enough reputation, you can pull a Saren or TIM and end it all, telling your squadmates to finish the fight. (DED) If you DON'T have high enough reputation, your Shepard attempts to attack a squadmate, slamming the against a wall, hand on their throat. If you brought your LI along, they are the one your Shep grabs. Your Shepard has tears running down their face and says "I'm sorry". Then you here a gun shot and Shep's face goes blank. Your squadmate lets you fall to the ground. Shepard says thank you and takes their last breath. Your squadmate signals to the other to press the killswitch. Epilogue starts, telling about all that happened after your death.
That's the way I would have wanted it anyway. This shows that your EMS and decisions MATTER.
Waddaya think guys, would that work for y'all? Obviously, I would like more detail than this, but it would be a good way to go. I would cry bullets though.