Azure: The Zero cold open being the alternate timelines is amazing yes. I never thought that CS1 could be an alternate KeA timeline though, haha (I played Zero/Azure before the CS games).
With the "too good to be true" thing, I feel like a lot of modern technological advances fit that! Especially in the medical field. Vaccines, antibiotics, insulin, etc. have saved an insane number of lives, and would've sounded too good to be true to people hundreds of years ago, but we have them now, and we're much better off with them. I think KeA's powers fit into that category too. It's a bit of a false dichotomy to save we either have KeA do everything for us or nothing - she can help in all sorts of small ways that make the world better as well.
Nah, that's not the same thing, and that's definitely not how the game presents how it would be used. We aren't talking about things like medical advancements, and Elie even makes that distinction when she says they're playing religion, not politics. This is more the idea that you can theoretically create a world with absolutely zero bad stuff in it where everyone is just happy all the time and all their desires are fulfilled. It's the same escapism fantasy the Aureole presented. Theoretically it sounds great for everyone, but in reality, it doesn't work out that way because in the end, there's someone determining what's good and what's bad. Crossbell rules the world at the expense of Erebonia and Calvard. That's what I mean by "too good to be true" because you aren't going to create a world where absolutely nothing bad happens, just nothing bad that the people in charge don't want to happen.
And yes, theoretically, it would be great to not leave everything up to KeA and just have her do little things here and there, but it probably wouldn't work that way in reality either. I guess it's just a matter if you think humans can be trusted with that level of power, and I generally don't.