I just can't understand indoctrination theorists. In any other media that kind of 'twist' ending would reward the player by letting you reflect and go 'oh yeah that makes sense!' or give you some sense of depth on a repeat playthrough. Circumstantial 'evidence' that you still cannot believe unless you ACTIVELY reject what is shown to you, is not quality writing. It would still not be genius. The IDEA is smart, but if it were intended...THEY STILL WROTE IT LIKE SHIT. At the very minimum, it should be clear that something isn't 'right' with Shep and the world. If they haven't communicated that to 100% of players they've failed to implement indoctrination correctly already, it's ok if there's some ambiguity as to how that plays out, if there's a trail of clues to follow and enough to put people on the scent because the ending is so clearly amiss.
Instead, we get an ending that is certainly 'amiss' but in all the wrong ways. I HIGHLY doubt that anyone on the entire planet who didn't already know about Indoctrination, watched the ending and thought anything other than 'that was hack writing'. At that point, even if it were true, it's a failure of an ending and it's a failure in the writing. Period.