To help eliminate some of its advantage, cards like A Whole New World can be helpful
You can add more, but we don't recommend it - more cards in a deck make it less likely that you'll be able to draw the ones you really need
R&D had figured out that they're a useful tool and explored how useful they can be
That up-front Adventure is just a bonus -- the real reward is outlasting the opponent with reanimation that draws from either graveyard, which is even better in "aristocrats" builds.
This status effect can be applied as early as the first turn, putting major pressure on the opponent
As a weird, smaller, Historic-legal twist on Tireless Tracker, I could see Lonis, Cryptozoologist show up in various Collected Company shells as a card-advantage engine to fight against removal-heavy control and midrange decks