PokemonSaveScreen::pbSaveScreen now accepts an optional argument which you can set to true when calling the save screen from the pause menu exit function. This changes the "Cancel" text to "Quit without saving", and causes a confirmation to be given when cancelling out of the Save Slot Select menu (since this would otherwise also quit without saving).
I also changed the default autosave behavior to be every 100 steps (instead of 30). When I was first developing the plugin, the autosave was entirely seamless, but it started causing noticeable hitching recently for whatever reason. I found the frequency of this to be annoying, so I toned it down a bit. I'm assuming it would have also been annoying for some of you. Continue to feel free to change it to whatever you want though.