The HOF mod makes many little things easier that would otherwise be extremely tedious. For example, every ten turns, one should check to make sure that the enemy is paying you as much gold as possible for that extra resource, otherwise you should renegotiate. Also, you should be keeping track of exactly what everyone is researching by constantly checking their trade screens, so that you can continue to research a technology that is good for trading.WHY?
Those kinds of things are painful and time-consuming, but if one person does them in a competitive game, then everyone else sort of has to in order to compete. The mod allows us to play in relative calm by making those things easy, while still being competitive and preventing things like "well sure you won, but I could have done that too if I felt like keeping written records of everyone's technology path."
Maybe that's not the purpose, but it's what I [author of very few posts] decided. Am I right?