I just finished and I feel like I have to post here, and desire opinions about what I'm about to express.
First off, these endings are ATROCIOUS. Somewhere along the lines, unless I was mixed up, the cosmicism philosophy of Mass Effect was thrown out the window... for a standard Man vs Machine story? You may as well not even bother getting all the war assets, just let the Reapers win because that is essentially what happens no matter what! You spend 30+ hours gathering resources and watching entire civilizations get destroyed, reinforcing that whole "you are a blink of an eye in the cosmos" and instead of continuing with that and ending with a fight for our very short existance and it's continuation.... we end up with this pigeon-holing garbage.
I swear the endings almost seem like they were piece meal put together after a drunken night out. Someone in the meeting went "HEY! Instead of having those war materials, alliances, etc, you spend 3 games procuring matter... what we do is make the Citadel the Mommy reaper, explain the Reapers "unimaginable" intentions with some awful slippery slope fallacy about AI and man not being able to get a long(ignore the Geth fighting along side the organics right out that freakin viewport!!)."
Why is the Normandy jumping through a Mass Relay? Isn't it fighting the MASSIVE REAPER FLEET TO TAKE BACK EARTH? It's like it was part of an ending where the Reapers win even though you destroy them... and they just copy pasta'd THAT into the Reapers are destroyed ending for no reason.
Oh and while we're at it, we'll pretend to be extra philosophical when we're really just being lazy slippery slope, strawman jack ass's, despite the fact that ME seems to have, in the past, at least TRIED to be grounded in reality. The little AI God makes poor Shepard make an altruistic choice for what I could see, is no reason. If that kid controls the Reapers... instead of letting Shepard control them, or destroy them or merge... why not tell them to F*CK OFF and just let us live in our "Chaos". Go fly off to another galaxy if you're THAT UPSET about Organics fighting with these inevitable AI since you have the capability to sit out in dark space and keep up with our moving galaxy.
Ugh, none of it makes any sense... like I said, seems to be hangover from the night before ideas. It would have been 1000% more satisfying to have the silly patriotic, stick an Earth flag in a Reapers eye socket ending that some probably expected, and that's silly to but at least that would a) have some closure and

make more sense.