Because the writers never wanted to go that route, obviously. You don't always get the sort of options you'd like to have.
The options I'd like to have are ones that rise naturally from the story, fulfill the ultimate objective, and are in keeping with the themes of the series. The ME3 ending has none of that.
We're talking about an AI based on the most arrogant race in Mass Effect so far
So what? Leviathan is a DLC that came out later so it wasn't a thought when they originally wrote the Catalyst. They also could have written the Catalyst differently. My suggestion would be in keeping with the rest of the series and would fit it well.
The Catalyst: "Without us to stop it, synthetics would destroy all organics"
Listening to the entire Catalyst conversation, i found nothing that indicated that they were only supposed to protect life in this galaxy.
Leviathan: " To solve this problem, we created an intelligence with the mandate to preserve life at any cost"
Leviathan: "The intelligence has one purpose: the preservation of life."
The Leviathan refers to the galaxy and the cycles as "an experiment" but that's as far as it goes. The mandate is universal in scope.
There's also nothing to indicate that they were thinking beyond the galaxy. As far as the Catalyst, again he's trying to prevent Organics = 0 so protecting the Milky Way fulfills that objective. While Leviathan does say "preserve life at any cost", again all it's conversations are in the context of the Milky Way. It's not proof that they never thought about other galaxies, but there is nothing whatsoever that mandates it.
Given they pulped their own creators, I think the Reapers are very much "outside the box" thinkers.
In addition, if left unchecked, synthetic life in other galaxies could surpass the Reapers, and screw everyone over if they invaded the Milky Way.
Considering they have done the same cycle over and over, no, they are clearly not. Lots of things theoretically could happen. That doesn't mean it's a good use of time or resources to devote to dealing with them. That theoretical race could just kill whatever Reaper enters their galaxy and the rest would never know.
Well, of course the annihilation thing was never actually true; anyone who's paying attention can see that the Citadel relay explosion can't even blow up the Citadel, let alone Earth. Plus, Normandy lands on a planet that's conspicuously un-novaed. But yeah, not everybody could figure that out, so Bio needed to change the VFX.
I don't understand how the fleet being stranded at the rendezvous point makes it any less stranded than it would be if stranded at Earth. I thought that was only to cover low-EMS cases and the Normandy's departure, myself.
The annihilation not being true was the plot hole. The Citadel does explode originally, just like the other relays. The writers just forgot about Arrival, hence why the EC changed the Relays to not explode. You are right that the fleet could be stranded somewhere else, but that's what they were attempting to fix, along with why your crew is on the Normandy when it crashes and not with you.
So what? People are wrong about stuff in ME all the time. This is just one more case.
Because Control wasn't set up properly. Even if it's now possible, there's nothing to counter the "it's a bad idea" side of the argument we gave TIM.
We're we even given the option to call him out on that? Because that's very true
Not really. We weren't given much opportunity to challenge the Catalyst at all, which is one of the largest problems.
It doesn't matter what the end of ME3 should have been. That isn't germane to ME:A. ME:A to be a Mass Effect title has to deal with the good and the bad of the ME universe and its lore. Retcon is almost always a loser with fans and while there is a majority of people who don't like the endings of ME3 there are a significant number of people who do like them. I feel the reasons the endings sucked is because they started ME1 with no idea how to end the trilogy, they started ME2 with no idea how to end the trilogy and they started ME3 with no idea how to end the trilogy. When they were almost finish development of the game they had to delay it yet again because the ending still wasn't done. That is the real reason the endings failed because they had no idea what the end game was when they started the series.
The endings of ME3 create endings that are too divergent from each other to make a viable game post ME in citadel space. Doesn't matter what should have been done or how bad the endings were implemented they are what they are. And this problem exists even if the endings were a masterpiece and people just went on and on how great they were. They would still create such divergent world states that a story can't be told that works in all possible endings.
So you can either change location and ME doesn't require a set location or you remove player agency and that isn't a popular choice. So they said we will change locations. QQing what they should have done in ME3 is pointless now. It is done and gone. the new series is set in Andromeda and players are either going to have to suck it up or not play. This is ME:A not ME4 and they told us time and time again not to call it ME4 and that it isn't going to be the 4th instalment of the current ME story.
SO if people were hoping for Shepard and some kind of game to fix the endings of ME3 they are not going to get it and frankly I am glad. I am done with the Reapers and the Shepard story. I want new stories told in the universe of mass effect. And if the stories are told in the same universe the easiest way to identify them as such is with Mass Effect in the title.
You're right that what the endings should have been doesn't effect Andromeda, but as someone who loves stories, I still like discussing it.
You're also right that they had no plan on how to finish it. However, I think totally abandoning the Milky Way destroys player agency just as much as them making some things canon does because it makes it not matter. The only difference is that they invalidate everyone's choices instead of only some people's. Also, please disconnect in your mind the desire to stay in the Milky Way from desire to continue with Shepard. They are two different things.
There is something to your statement that it's ME:A, not ME4, just like DA2 should have had a different title. But the concern is that it won't have some of the central elements of the franchise. Imagine if DA2 had no elves and no chantry or circle.