1) Added an option for fixing Illegal Enchantments to specify a custom level override, this means you can override the vanilla maximum for a specific enchantment to a level you specify. Eg. Sharpness.10, this would only fix items with sharpness 11 and above.

https://github.com/dniym/IllegalStack/wiki/CustomEnchantOverride

2) Added protection against the RNG Enchant exploit. This exploit allows players (using a cracker program) to predict and select specific enchantments to a given item. This protection defeats this exploit.

https://github.com/dniym/IllegalStack/wiki/PreventRNGEnchant