Farseek, Nature's Lore, and Three Visits can fetch up non-basics and/or untapped lands, which are huge improvements over actual Rampant Growth
Wizards of the Coast Loves Midrange Wizards just loves midrange decks
Wizards of the Coast notoriously doesnt release the MSRP for its products, so the price of all of the products is extremely flexible
Beholding the same dragon again and again is possible, so once you've done it once, you can keep revealing the same card to your opponent over and over
Rather than focusing exclusively on hardcore players for a slice of that rapidly shrinking pie, they'd go in the opposite direction
Overall Zimone does a lot of different things, and she does them very well