Now, like I said above, the nature of your deck is such that you dont have to have your graveyard hate cards be super-hard in the abstract, but if you bring them in against the mirror, they have to do something to justify the cost
There are also more subtle things like decks having enough instant-speed removal to sometimes encourage creatures to attack elsewhere, including several enchantments that sit in play and can kill at instant speed
You are losing the looting ability to be able to cast bigger artifacts straight away
Gamble is another tutor option, but it has a rather risky downside of randomly discarding a card from your hand, including potentially the card you search for
They both cost the same, have four Willpower, and can stop an opponents character from questing