That's the main point right here. No need to be extremely serious about it, it's still just a suggestion. I'm not going to get into the "logic talk" because we're talking about pokemon anyway. The main issues that i see with this suggestion have been listed, but i'll repeat:
1 - It's a lot of work. While Amethyst would probably enjoy some help with Reborn, i don't think she'd add something like this anyway. And the main reason for taht would be...
2 - The fact that she knows how most (If not all) of the game is going to go. If she decided to add something like this, she would have to go out of her way to code something liek that. I don't even know if there's enough "space" to fit something like this in the game right now.
It' not a bad idea, i can admit that. But for the stage that the game might be right now, it's not the best idea.
Don't simply take my words though. After all, i don't speak in Ame's behalf. She didn't saw this yet. While she might agree that this is too much to do, maybe there's something in the middle of your suggestion that she can use. Just saying...