Then it also could be working against the player, if you rely on Autosaves, then you can be locked in an unfavourable match up every time. You should make your own saves, I don't think they need to add more autosaving in.
You should be quick saving before every encounter in case you need to rethink your approach to the fight. If you are relying on autosaves, you don't have this option.
Still no reason not to include the feature, especially if you can opt in and out of it at will. People make mistakes and oversight and get tunnel vision.
