The mechanic doesn't even have to get changed. It can depend (as usual) on a single choice, but this time preceded by "WARNING: FINAL/END DETERMINING GAME CHOICE, SAVE BEFOREHAND". Besides, auto save almost always saves the choice moments so you can easily return to itWhile I get what you're saying, I do have become spoiled by this game so I only save when the chapter is finished. So, when a choice pops up, I no longer save because why would I? The bad choice is obvious and I just return to that choice anyway. Suddenly changing that mechanic would be annoying.