This is about as good as a solution I can get, but basically, I've added an item called "Compatibility Pill". This item, when used, adds 3 hunger and 3 thirst. This exists to allow you to use mods that override the Human character without breaking this mod.

The only reason this mod overrides the Human character is to add a check to make sure the Hunger and Thirst afflictions disappear. As much as I'd like not to have to override, it's necessary for conveniently applying necessary afflictions.

If you really want to use a mod that overrides Human for more complex things but doesn't have support for thirst and hunger mechanics, you can set the overriding mod above this one to add its mechanics, and use the Compatibility Pill to apply hunger and thirst afflictions whenever they disappear for whatever reason.

It's a dirty fix, but it's the best I can do without creating an entirely new mod just to combine the changes.