Apparently SOMEONE who designed it knew what it was going to do, that had to. A little odd that the 3 beams fit incredibly well with the starchilds philosophy. Also, as for TIM, sounds like the had a pretty god damn good idea hwo to control the reapers, based on the ending.
The Illusive Man poured uncontrollable Reaper tech into his body and got himself indoctrinated. He didn't have a pretty damn good idea on how to do anything. Furthermore, people keep saying the three endings fit with the Catalyst's philosophy. They don't. The Catalyst's philosophy was "We're needed so organics don't kill themselves with thier own technology." It only had one philosophy before the Crucible was introduced to it. After that, it was able to rethink itself.
The only difference is, lolindoctrinated, so please go kill yourself so you can control the reapers, sine it isnt like according to Javik there wasn't someone else who thought like this, a little odd TIM thought the crucible and the citadel was crucial in doing this. So, no, TIM isnt crazy.
The Illusive Man opposed Shepard every step of the way to gain control, and in the end control was impossible for him but possible for Shepard. He was wrong, and he was crazy.
And again, if Shep isnt indoctrinated from the arrival artifact, then we cant take everything in the game at face value, and the fact that Shep doesn't die also shows we cant take the ending at face value, which puts into question ALL the endings.
And that's still not true. The Catalyst does not say "You'll die" in destroy. He says you are partly synthetic. Partly. And you can either die, or not. Everything the Catalyst tells you
will happen, does happen. The reapers cease their attack, or they're killed, or synthesis, and the destruction of the mass relays happen the way the Catalyst says they will.
It is not shocking the the least that the rejections of the endings as we know it AND the IT theory has sprouted up everywhere. And it is apparent from teh devs comments that they are fine with this, because it was left to speculate what really happened.
The devs have also been clarifying several things.
And yes what we know for sure is that the scene showed that they stopped attacking. That is it.
And that's the last we see of them.
It's not really harmless, because the Modus Operendi of Reapers is the deceptive manipulation of minds...
Reaper Master becoming your microsoft office assistant in your quest to undermine him is not something that should just roll off your back...
It should severely unsettle you...
The Catalyst's task, above all else, is to preserve the existence of all organic life. The Crucible introduced new means to do this, means the Catalyst probably deemed preferable because the Reapers were not only being resisted in the last few cycles, but the synthetic race they created was benign.