The creche appears to be the victim of a severe rewrite. There doesn't appear to be any explanation as to how the Gith know you have the artifact, nor why the option to hand it over to them is in any way sensible for the player unless they're meta-gaming. Handing it over to the Gith is a great sequence, but it feels like a bigger part of something that no longer exists.
What we know is that originally the Mountain Pass was a bigger area, one that involved a big conflict between Orin and her forces and the Gith. Kithrak Voss would show up and get injured and his dragon tadpoled. Voss still shows up afterward with inexplicable injuries and no dragon. So, it's possible that in this version of the storyline, the Gith would've learned that you have the artifact (perhaps it would protect you from something) and then demand you hand it over, leading to everything with Vlaakith and going into the prism and so on.
But as it is, it just feels like something is missing.
