Would you have wanted to see a second gem war?

That sounds cool but in my opinion, it's for the best things never escalated that far, Steven didn't need that in his life. He's got enough trauma as it is. Depending on when this happened, Lapis Lazuli probably would've left Earth in order to be safe from the diamonds and other enemy gems. It would be an interesting thing for Peridot and Amethyst to go though, neither of them have been through a war before in their lifetimes (Same with Steven.) but hopefully there would've been enough time for Pearl and Garnet to prepare everyone and tell them what they need to know.