We have no idea whether or not anything was retroactively changed, the player's perception is too limited to confirm that.
Alternatively, it could be an unstable time loop. Where the loop is always happening but events aren't necessarily the same every time. In that case the timeline we experience may just be one of countless iterations of events.The question itself is about the structure of the time loop. Is it what we would describe as a 'Stable Time Loop', or did the story actually play out twice, with the second iteration of events being identical to the first? The reason why Argos supports this being a 'Stable Time Loop' is because he shouldn't trust you yet if this is your first meeting.
If we're to believe there's a lower limit of aetherial density beyond which life can't survive, it would be.
Those aren't the only two possibilities. For example, WoL could have mentioned Lahabrea and Elidibus, but not elaborated that they too were Unsundered. It's extremely likely that WoL talked about the rejoinings in reference to Emet-Selch and the Ascians, given one of the options when first broaching the subject is talking about the sundered reflections, and Emet's actions on the First attempting to rejoin the shard.Ultimately though, there exists two possibilities, one where we mention at least one other Unsundered and one where only Emet is mentioned.
The fan-translation you provided and the official translation posted to the liveletter thread aren't the same. Yours,Except he distinguishes between those two as different interpretations. The timeline being the same regardless and Venat working hard to maintain things are separate conceptions of what happened, with him believing the former and not the latter.
the official,Q: I don’t really understand why the Warrior of Light messing around in Elpis didn’t create any alternate timelines. What happened?
A: Well, I think the most important thing is that you can come up with your own theories for this one. In my personal interpretation however is that the timelines were always the same. Another interpretation you can have is that maybe Venat worked really hard behind the scenes to ensure the timeline didn’t go awry. Therefore the Warrior of Light was always acting in accordance with this plan of Venat so the timeline that we are aware of didn’t change when we went back to the affected. I personally think that when we went to Mare Lamentorium and we first met Argos and Argos really took to us when we were able to ride it, that's basically the proof that at that point, the timeline is going accordingly. We are adding all these stuff to New Game+ in 6.1 so if you’re interested in this I suggest you replay it and think about these questions when you’re playing it.
In both cases, he doesn't establish that a predestined timeline and Venat working to ensure things stayed the same are mutually exclusive. In fact it could be both. But in the official translation, the wording is much more clear on Venat's motives explicitly being to keep the timeline aligned with WoL's future - Even prior to the secondary interpretation of Venat herself being directly responsible for keeping the timeline intact, the first, Yoshida's, establishes that this was her motive. Additionally, there really isn't any point to him including this idea about her if it wasn't in line with Venat's character.A: First of all, we’ve left that part up to interpretation.
With that said, my personal interpretation is that the past and present were always the part of the same timeline. Although there was still a possibility for the timelines to diverge, the Warrior of Light was unwittingly acting in accordance with Venat’s plans, which unified the past and present. Another interpretation might be that Venat worked really hard behind the scenes to ensure that the timeline wouldn’t go awry.
Seeing how Argos took to us on our first meeting, I’d say that proves that the past and present were already unified.