Yes I think you are right, the new names for the BV are not right. We will have to come up with a term that is more intuitive, the problem with reach for a term is that it infers a bonus against infantry as well.
For bonus vs elephant, only spears which have a length from the hand greater than a certain amount get a bonus. What we will be looking at doing in the future is adding a bonus v elephant to very light units as the most successful attacks on elephants were not from the weapon but rather by those who were able to evade the elephants attack.