So saving works normally now.
But for the experience, what do you mean it's not saved?
The patch posted should only make you keep whatever Exp you had after you get a Game Over.
The Exp is not saved at any point, the Exp is only kept after cotinuing from a Game Over.
Does that work?
Yea I did a quick test myself and the "Keep Exp" Saving looks good now.

...though I still have an issue with the "Manual Save Menu" (MSM).
If you happen to select "Continue" from
that menu,
(rather than the Game Over one) you
don't keep your exp.
I know it was originally just meant for Game Overs, but
since both menus are identical in appearance it kinda
makes it feel.. inconsistent, when it doesn't stick.
Here's the thing... when I 1st tried out this mod I also
added in some of those optional patches too (I mean, why not?),
with 1 of them being the "New Exp" patch. Since both that patch
and the MSM use similar 'shortcuts' to bring them up, I would
occasionally bring 1 up by mistake (yea, I know, that's my bad...).
So naturally I just wanted to 'Continue' after pulling up the MSM
most of the time. But, despite using the "Keep Exp" patch, it doesn't
actually keep it in that instance. ...Y'see what I'm getting at?
Would it really be a big issue if the "Keep Exp" patch
was altered to affect the MSM as well?
...also, umm... not to be a pest or anything, but...
What about the rest of my last post, will you do anything with that?
...sorry. Since you didn't mention anything before
I'm just curious if any of that will get used/considered.
(I kinda spent a lot more time writing out that last post than you'd think...)