
Originally Posted by
Enkidoh
I do not believe that we are story wise stuck in the First like the Archons are, and can travel freely between the two worlds at will.
My reasons for thinking this mainly come from some things said at the end of the game.
When farewelling the Scions in the post-credits scene as we prepare to return to the Source, they talk like the Exarch would have to summon us again to get us back to the First - joking about him bringing us to the city and not dropping us in the forest next time. Then he has to specifically prepare the portal for us to use.
For that matter, we shouldn't need the portal at all when we can just freely teleport between worlds whenever we like!
And on returning to Tataru at the end... well, firstly she's surprised that you're back, because we haven't been gone as long as she expected, so apparently there was time dilation at work (despite part of the "freely teleporting" handwave being that time was currently synced up between the two worlds). But it also suggests that it's the first time she's seen or heard ftom us since we left, other than getting a message via Feo Ul - indicating we either never went back to the Source, or didn't bother to drop back in and let her know we were okay. And I'd rather assume we didn't/couldn't get back. Again, needing Feo to take a message suggests we're stuck there and can't just drop back to Mor Dhona to say hi.
Additionally, if you go back to the First and talk to the Scions post-game, they remark that they didn't know you'd come back to the First - as established in the earlier scene, the Exarch was supposed to let them know when he was summoning you again.
So, all those things together, I assume the story was written as if we were unable to freely travel. Presumably there are other benefits to being physically teleported there - perhaps we need a physical body to absorb the Light - but I don't think interworld teleportation is supposed to be one of them. The ability to do so is written into the story, but it feels like it doesn't fit the rest of the evidence.