I don't wanna give any credit to Weekes given he's such a massive faggot, but I can totally understand wanting to axe the old baby god plotline. It's such a massive shift in world state compared to trading one of the Warden's lives for Urthemiel's, any ambient resolution that's not central to the plot would feel like ass. If Gaider really wanted to make Kieran relevant from the get go Origins had to always end with the baby ritual. But then that would've been tacky when freedom of choice is the selling point. That's why the default world state has the martyrdom choice. Most of the choices in past games could only lead to potential fanservice, not real impact. The whole keep thing was a Peter Molyneux-tier overselling of choices and consequences. It just took three games for them to no longer be able to keep up that facade.