Similar to Amaria, I expect we'll see the scene as the screens predicted, but she won't end up dead. I kinda like the theory of her being reborn through arceus somehow.
I fought him because having an inside man helping us against Team Meteor is pretty helpful. I'd be surprised if he gets severely punished for losing to us, since basically every meteor before him has lost as well.
You need to leave the city and head into ametrine mountain. From there you use dive (which you can get back at the circus from a puzzle) and find your way around the giant iceblock. From there go through the cave to ametrine city.
Eggs have a chance to be generated after a certain number of steps, so just hop on your bike and ride around and keep checking in with the man outside the daycare.
These seem like kind of contradictory statements, you find the game too easy with the team you have but won't use different pokemon because that would make the game too hard?
The grand hall as the heart could make sense. As for why they used different pulses, maybe they had trouble controlling that pulse similar to the abra pulse, so they moved in a different direction.
The game has all of the sprites, but that doesn't necessarily mean we'll be getting the stones anytime soon. Besides, it doesn't really matter until we get a mega bracelet.