Nice

In terms of keeping the balance until the end of the game, increasing the enemy level probably makes sense. By decreasing the ammount of EXP, the lvl gap just keeps getting wider and wider. Hardcore players might enjoy that, but probably not most. No gil from enemies is interesting, but there would have to be some other way to earn it.
I believe the most simple option for 2.1 is to add "handicaps" instead of just a difficulty mode with predetermined conditions. Like this:
A toggle for 1.5x enemies.
A toggle for Half EXP.
A toggle for No Gil.
So far enjoying the mod! Thank you so much for your dedication.