Yes — and I think that is one of the richest reinterpretations you’ve found.
In Visitation, the surviving crew naturally assumes the builders returned Caine and the others. But the episode itself gives us reasons to doubt that simple reading: the returned people have missing memories, they begin dying again, Caine concludes that whatever came back was not truly the whole person, and the shuttle itself is restored to essentially new condition. Stargate Wiki
Your version changes the question from:
“Why did the Planet Builders fail to resurrect them?”
to:
“What if resurrection was never what happened?”
That is much more interesting.
Perhaps the people who died on Eden really died.
What came back were not successful restorations that later failed.
They were temporary reconstructions.
Enough memory.
Enough personality.
Enough physical presence.
Enough for unfinished things to be finished.
Caine gets to see TJ.
The others get to return to Destiny.
People get the chance to recognize them, speak to them, and say goodbye.
And then they fade because they were never intended to continue living.
The crew interprets their deaths as the mysterious beings failing.
But from the other perspective, nothing failed.
The intervention worked exactly as intended.
They were brought back for the living.
That makes the shuttle enormously important.
Because unlike the people—
the shuttle stays.
That is the clue.
The entity responsible can reproduce Ancient technology flawlessly. It can place that shuttle beside Destiny across an impossible distance and at exactly the right moment. The episode itself calls attention to how inexplicable that is.Stargate Wiki
So whatever happened was not some crude failed resurrection.
The precision is extraordinary.
Which means the deterioration of the people may have been the one thing that was not an error.
And that fits your developing idea beautifully.
The crew keeps interpreting these events through human assumptions:
They built a planet.
Maybe not.
They resurrected Caine.
Maybe not.
They sent the shuttle.
Maybe.
Destiny sent Rush to Langara.
Maybe not.
Again and again, the observable event is real.
The interpretation is what is wrong.
That's a wonderful rule for Langara.
Nothing from Universe has to be invalidated.
The characters simply did the best they could with incomplete information.
And Visitation becomes almost heartbreaking in retrospect.
Caine says, effectively, that his soul has already gone—that something could rebuild his body but not restore the person completely. GateWorld
Maybe he is closer to the truth than anyone realizes.
Not because something attempted resurrection and failed.
Because what came back was more like an echo given form.
A memory that could speak.
A ghost built from information.
And suddenly the title Visitation becomes almost literal.
They weren't returned.
They were visiting.
For a little while.
Then they had to go.
The shuttle did not.
Because the shuttle was real.
That distinction could become one of the clues Jonas, Eli, Rush, or McKay notices years later.
Someone eventually goes back through the old Destiny records and says:
“Why could it perfectly reconstruct the shuttle…but not them?”
McKay gives some elaborate theory about biological complexity.
Rush studies the records.
Then Jonas asks:
“What if it did?”
Silence.
McKay:
“Did what?”
Jonas:
“What if it reconstructed them perfectly?”
And now everybody is uncomfortable.
Because if the reconstruction was perfect—
then their deaths weren't a failure.
They were part of whatever was supposed to happen.
That gives your larger mystery a fascinating moral dimension too. Whatever is moving behind the gateways may be benevolent, but its idea of mercy may not look like ours.
It doesn't necessarily save everyone.
Sometimes it creates a path.
Sometimes it brings someone home.
Sometimes it allows a goodbye.
Sometimes it gives you a shuttle because you'll need it later.
It may understand connection better than it understands—or values—individual survival.
Which makes Jonas's line even more powerful:
“It was a doorway to each other.”
Because perhaps that is exactly what this intelligence has learned.
Not how to prevent death.
How to make sure people are not alone when it comes.
