Hi, first of all great mod, the hardcore mode of New Vegas was for me a great gameplay addition, and it adds a lot for immersion and the survival aspect for the game. But IMO your mod clearly has balance issues, I've been playing a bit with it and even with the slower preset (80-90 hours in the book) it seems that after 17 hours more or less your character has spent around 250 points of hunger / dehydration. So if you take into account the values of food and water, you need in this case like 5 jugs of water and around 15 food items (or less if you use the 30 point ones) to maintain your character for 17 hours. Its a crazy amount lol (and it isnt the default preset!)
Its a matter of opinion of course, but I think if you set by default the 80-90 hour option, and multiply the hunger and hydration values of the items by three, it would be a decent balance. In that case you would need each 17 hours 2 jugs of water and 5 food items, something reasonable and balanced with the gameplay and realism aspect of the game.