Okay, I've been thinking about two different approaches while I'm hammering code in a new SanchoMod for another VN, so pic example(s) will be from that.
Option 1 (the easiest) is to do as you suggest and simply make an option for it to be toggled off. This would be simple and allow me to bring the "s" key option out of "Cheats" and into "Options" since there would be an even number for that screen's balance. Cons: although very simple to code I'm afraid most folks wouldn't even know the option exists without studying each mod's SanchoOptions/Cheats screen to see if it exists or not, plus it's just not very flexible tbh.
Option 2 (the most complex but I've already success with a tech demo) is to claim my own page so I get several slots that will allow me to even make auto-saves on a per chapter/episode basis. I liked the idea with my current hangover so I decided to give it a whirl and this is what I came up with off the cuff:
The screenshot below is the last scene of this other VN's particular episode two. Since the Core mod now recognizes what episode/chapter your on (via the stat usually found under the player's "Name" in the stats), it automatically makes a save in the second slot (since it's episode two) and names it appropriately.
Now, you'll notice that I claimed an entire page for myself ("69" being the obvious page choice of course) and since that page number would take too many right-page grouping clicks (the ">>" button) for the Player to find and access it I also added a quick page button to it in the Save/Load screen. All of these things are marked with red arrows in the above screeny.
So, it was a bit more complicated to write the code into the Core but now that it's in there it's easily accessed at anytime I need it. So, yes, an option to toggle the save on page Quick would have been easy enough, but I kinda think this other approach is cooler and has more expandability in the future.
Thoughts?