1.0 Ul'dahn story arc

[Anonymoose]

Is there any reason not to think that the three stories start at the same time and the star-showers witnessed at the start/end of all three Echoes aren't the same pair of events?

It's very ambiguous. There's not much reason not to assume this, and then again there's not much reason to assume it. In tangible terms, if the horn in Ul'dah is the same horn from Lominsa, then they cannot take place at the same time, case closed. If not, well, let's think in terms of star-showers.

People started awakening to the Echo ten years ago, although there's been a lull up until the last few months as of 1572. Enough people have claimed to see a star-shower that it's one of the few things the Path of the Twelve has connected to the phenomenon. In the story arcs, we see two in each - one that is our personal awakening to the Echo (that no one else seems to see, and yet some instanced-NPCs still mention, much to my confusion)... and one that is rather public and witnessed by the Archon arc-partner.

Occam's Razor would say that all three public star-showers were the same one event witnessed from different angles, and that every awakening begins with an anachronistic flash of this event.

Whether or not that's the case, though, is incredibly hard to discern from what information we have.

EDIT: Just for fun, I'm going to pull up all in-game visuals of the star-shower and triangulate its position based on player vantage point... if we're going to assume they were all the same star-shower, we'll at least need it to hold up to being in the same place. (See? This is why I love this forum. No matter how motivated I am or how much I think I know, you guys always give me ideas...)