WARNING Below is a very big spoiler discussion so don't go below if you are not ready.
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Now then....
What do you think about what we learned about the civilizations of other stars and what consequence they may bring due to Meteion's actions to our stars?
For me...
While Meteion may have caused the destruction of certain world indirectly or directly based on her sister's state of mind during their mission but a good amount of the worlds her sister arrived to were already destroyed by the actions of the civilization that once reside there. Yet, these are not all the stars as there are many yet to be explored by Meteion's sisters.
However, the report showing how so many ended up being destroyed by their own actions even before Meteion arrived does make me wonder if FF14 is the only way that can produce the Hope needed to survive and what this may mean for FF14 lore.
I have concerns that Meteion's sisters may have also brought conseqences with them when they returned to Etheirys.
This consequence may take its time to reach the world of FF14 to a point by the time it arrives the world will have already become what it is now and I feel it may lead to what may happen in Season 2.
Yoshi-P mentioned while season 2 will no longer continue the Zodiark versus Hydaelyn storyline since it ends in 6.0. If I remember right, he also mentioned we should keep a eye out for something that will hint towards what Season 2 storyline will be about but he wants us to guess until 6.1 and beyond.
I mentioned before in past comments in other post but there is a strong feeling in me that Meteion and her sister's actions may bring about a Warrior of Despair. Maybe as a antagonist for Season 2 or potential ally seeking to find hope where he/she failed to find in his/her world resulting in his/her world falling into Despair and becoming destroyed by the Final Days of his/her civilization's own creation either before Meteion's sister appeared or after Meteion's sister appeared.
The lore about FF14 world being potentially the only star that may produce enough Hope to survive is one of the factors that does bring about this guess I am making. However, this also does open up possible story about FF14 world is not the only Star that have Heroes that can produce the Hope needed to allow their world to survive even if Season 2 still remains on the Source since we still have a lot of land still unexplored in the Source.
Those who do not know, probably many since not many would have played Final Fantasy Mobius, the Warrior of Despair is a rather new concept to the FF series SE introduced years ago in Final Fantasy Mobius which is now shutdown sadly.