Reapers don't need to refuel. Their power plants and Eezo drives appear to be able to run nigh indefinitely without the need to refuel or discharge. The technology exists.
That is a load of crap. By virtue of existing in our universe, they are subject to the same laws of physics that govern us and our technology. That means they cannot be perpetual motion machines who run forever and ever without restocking on fuel, power, ammunition for their weapons and material to make repairs and make husks.
Who says it isn't unbelievably huge? It would have to be and most of that would have to be storage for supplies, fuel included. Then there's also the convenient omission that if you're going to adapt Reaper drives, why not adapt their cores as well? Finally I never said it had to be sustained flight. I assume 570 years is the calculated estimate to arrive and Andromeda? I don't recall having to keep any appointments for that time. I can easily see the Ark flying on a "burst" schedule to conserve fuel. If it adds a thousand years or so to the journey, who cares? We're distancing ourselves from the trilogy. Time is irrelevant.
Nowhere has it been stated they CAN adapt Reaper drives OR Reaper cores, which is completely beside the point because at Reaper speeds the journey will take 230 years, which is still way, way, WAY too long.
And "flying on a burst schedule"? Do I understand you correctly that what you actually mean with this is that they will stop now and then and generate more power over a few centuries, then continuing? If so, you do understand that this will only increase the power draw from the cryopods, completely negating any benefit to stopping in the first place?
And assuming they wake up from stasis to the cryopods can be turned off to they're not drawing any power, that means you need to bring along an additional 1000 years of consumables, either in the form of frozen food or water, or renewable sources like the ones in quarian liveships. Both forms drive up the size and the cost of the ship by astronomical amounts. You no longer have a spaceship at this point, but an FTL-powered space station.
If it adds a thousand years or so to the journey, who cares? We're distancing ourselves from the trilogy. Time is irrelevant.
The people who has to increase the ship's size to accomodate for another millenium of consumables would care. Time is definitely not irrelevant. If anything, time is THE most relevant factor. Time is what causes the resource requirements to balloon to impossible levels. The only way to reduce time is to increase efficiency, and that requires, ironically, centuries if not millennias of innovation.
Which brings me to the "Wait Equation" - there is no point in building an enormous, resource-hogging intergalactic ship many times more expensive than the Crucible that will take 500 years to reach Andromeda when 250 years later a ship only a fraction of the size and many times faster will be produced, catching up to and racing past the first ship.
And sending the ARKCON colossus during the Reaper War? That implies all the relevant tech was developed in a manner of months (unlike the Crucible, which was based on ancient blueprints millions of years old), that all parts were fabricated and then assembled in a manner of months. Simultaneously with the Reapers systematic destruction of the galaxy's infrastructure and economy. Concurrently with the construction of the Crucible, which was noted for being an astronomical drain of money, materials and personnel.
You. Cannot. Be. Serious.
Modern technology just makes do with discharging near whatever object will take it, because why not? What would the use for detachable storage batteries be in normal operation? It'd be a waste of material to design something like that when you can just skim a planet or asteroid or pay a nominal fee to discharge at a station. This is like claiming we couldn't invent better long-range FTL. We probably could, but with the relays, why bother? That's the whole point of the relay trap to begin with.
It's not a waste of material when you consider the time expense in consumables and the fact that a lot of star systems may be ineligible targets for drive discharge, for example star systems with planets that lack magnetic fields. The size of the planet also determines how long discharging takes, and the size of the ship determines how often it has to discharge. The ARKCON monstrosity would have to stop to discharge as often as a pregnant woman has to stop to go to the bathroom.
This is of course beside the point that discharging tech and better long-range FTL comes really handy when you're charting unknown space in search of relays to unlock, thereby enabling faster travel across the galaxy. You know, what Mass Effect: Andromeda could have been about if it was called Mass Effect: Milky Way instead.
Yes... and? That's the whole point, and seeing what they come up with to address this is far more interesting that "look a wormhole lololol"
While I agree that a wormhole would be a really boring and contrived solution to the problems, it's also the ONLY solution to the problem. What you are suggesting isn't possible with the Milky Way races current level of technology. It might be possible in the distant future when spaceships are more efficient (like 1250 times more efficient), but not right now and certainly not during the Reaper War, when all money and innovation that ISN'T being outright destroyed by the Reapers is being funneled into the war effort.
It actually sounds like a neat idea.
You're on a human ship with a full compliment of humans as your crew, and some members of other species as well but mostly human, and you're thrust into a completely new galaxy with no way of getting back home, so your crew is just out to survive amongst a new galactic community. The crew could be fairly large, sitting at around a few hundred which would make more sense than a crew the size the Normandy had going. That way, the human race would survive a little longer against not only the perils of new species (probably violent but I would expect some would also be friendly) and environments but also from dying out due to age (at least for a couple of generations hopefully).
*buzzer sound* What is a minimum viable population?
To prevent a genetic bottleneck and the deluge of health problems that would cause, every species needs to have a population of at least 500 individuals, split evenly across the genders, naturally. For the best chance of long-term genetic prosperity in Andromeda, each species would need ten times that number.
"It actually sounds like a neat idea." Yeah, until you do the research and realizes it's not.