I havent played tyranny. Might take a look into it.
You should. It is one of the best CRPGs ever made.
If anything, I expect that the tadpole is removed shortly after what we see in EA and the rest of the game will focus on a different narrative that may or may not be tied to the illithid tadpols.
I hope so. Nothing in EA points to that as of now, but we simply know very little about the broader story.