Each activation upgrades the creature
While drawing two cards on the second turn its out is very feasible, its by no means meta-breaking
Even just with rares and mythics, thats a lot of fodder to boil down to just 71 rares and 20 mythics that make up this set, so Id imagine theyre all really good cards
They can also be great options for really fast ramp for a combo deck that just needs to hit a ton of mana early, especially if you're on a budget because a lot of them are really cheap
folding triple-faced cards
If we're going to spend time flipping through our collections, saving pennies to order the cards we need, finding the exact alt-art version of our Commander, choosing the correct color of sleeves, and organizing a night with multiple people in the same place to play a game, it's worth more than a single calculation to figure out how much mana we need, and how much ramp we should run